diff --git a/ArduPlane/AP_Arming.cpp b/ArduPlane/AP_Arming.cpp
index e638ec956e..d6894ee298 100644
--- a/ArduPlane/AP_Arming.cpp
+++ b/ArduPlane/AP_Arming.cpp
@@ -173,7 +173,7 @@ bool AP_Arming_Plane::quadplane_checks(bool display_failure)
         ret = false;
     }
 
-    if ((plane.quadplane.options & QuadPlane::OPTION_ONLY_ARM_IN_QMODE_OR_AUTO) != 0) {
+    if (plane.quadplane.option_is_set(QuadPlane::OPTION::ONLY_ARM_IN_QMODE_OR_AUTO)) {
         if (!plane.control_mode->is_vtol_mode() && (plane.control_mode != &plane.mode_auto) && (plane.control_mode != &plane.mode_guided)) {
             check_failed(display_failure,"not in Q mode");
             ret = false;
diff --git a/ArduPlane/GCS_Mavlink.cpp b/ArduPlane/GCS_Mavlink.cpp
index d50062ddfa..6d294b1404 100644
--- a/ArduPlane/GCS_Mavlink.cpp
+++ b/ArduPlane/GCS_Mavlink.cpp
@@ -982,7 +982,7 @@ MAV_RESULT GCS_MAVLINK_Plane::handle_command_long_packet(const mavlink_command_l
                 const bool attempt_go_around =
                     (!plane.quadplane.available()) ||
                     ((!plane.quadplane.in_vtol_auto()) &&
-                     (!(plane.quadplane.options & QuadPlane::OPTION_MISSION_LAND_FW_APPROACH)));
+                     !plane.quadplane.option_is_set(QuadPlane::OPTION::MISSION_LAND_FW_APPROACH));
 #else
                 const bool attempt_go_around = true;
 #endif
diff --git a/ArduPlane/altitude.cpp b/ArduPlane/altitude.cpp
index cefe32be21..57f551ed8a 100644
--- a/ArduPlane/altitude.cpp
+++ b/ArduPlane/altitude.cpp
@@ -180,7 +180,7 @@ float Plane::relative_ground_altitude(bool use_rangefinder_if_available)
 
 #if HAL_QUADPLANE_ENABLED
     if (quadplane.in_vtol_land_descent() &&
-        !(quadplane.options & QuadPlane::OPTION_MISSION_LAND_FW_APPROACH)) {
+        !quadplane.option_is_set(QuadPlane::OPTION::MISSION_LAND_FW_APPROACH)) {
         // when doing a VTOL landing we can use the waypoint height as
         // ground height. We can't do this if using the
         // LAND_FW_APPROACH as that uses the wp height as the approach
diff --git a/ArduPlane/commands_logic.cpp b/ArduPlane/commands_logic.cpp
index aa5c20058a..4d8d5e40f9 100644
--- a/ArduPlane/commands_logic.cpp
+++ b/ArduPlane/commands_logic.cpp
@@ -98,7 +98,7 @@ bool Plane::start_command(const AP_Mission::Mission_Command& cmd)
         return quadplane.do_vtol_takeoff(cmd);
 
     case MAV_CMD_NAV_VTOL_LAND:
-        if (quadplane.options & QuadPlane::OPTION_MISSION_LAND_FW_APPROACH) {
+        if (quadplane.option_is_set(QuadPlane::OPTION::MISSION_LAND_FW_APPROACH)) {
             // the user wants to approach the landing in a fixed wing flight mode
             // the waypoint will be used as a loiter_to_alt
             // after which point the plane will compute the optimal into the wind direction
@@ -286,7 +286,7 @@ bool Plane::verify_command(const AP_Mission::Mission_Command& cmd)        // Ret
     case MAV_CMD_NAV_VTOL_TAKEOFF:
         return quadplane.verify_vtol_takeoff(cmd);
     case MAV_CMD_NAV_VTOL_LAND:
-        if ((quadplane.options & QuadPlane::OPTION_MISSION_LAND_FW_APPROACH) && !verify_landing_vtol_approach(cmd)) {
+        if (quadplane.option_is_set(QuadPlane::OPTION::MISSION_LAND_FW_APPROACH) && !verify_landing_vtol_approach(cmd)) {
             // verify_landing_vtol_approach will return true once we have completed the approach,
             // in which case we fall over to normal vtol landing code
             return false;
diff --git a/ArduPlane/events.cpp b/ArduPlane/events.cpp
index 519464b443..479b0670d3 100644
--- a/ArduPlane/events.cpp
+++ b/ArduPlane/events.cpp
@@ -57,9 +57,9 @@ void Plane::failsafe_short_on_event(enum failsafe_state fstype, ModeReason reaso
     case Mode::Number::QAUTOTUNE:
 #endif
     case Mode::Number::QACRO:
-        if (quadplane.options & QuadPlane::OPTION_FS_RTL) {
+        if (quadplane.option_is_set(QuadPlane::OPTION::FS_RTL)) {
             set_mode(mode_rtl, reason);
-        } else if (quadplane.options & QuadPlane::OPTION_FS_QRTL) {
+        } else if (quadplane.option_is_set(QuadPlane::OPTION::FS_QRTL)) {
             set_mode(mode_qrtl, reason);
         } else {
             set_mode(mode_qland, reason);
@@ -152,9 +152,9 @@ void Plane::failsafe_long_on_event(enum failsafe_state fstype, ModeReason reason
 #if QAUTOTUNE_ENABLED
     case Mode::Number::QAUTOTUNE:
 #endif
-        if (quadplane.options & QuadPlane::OPTION_FS_RTL) {
+        if (quadplane.option_is_set(QuadPlane::OPTION::FS_RTL)) {
             set_mode(mode_rtl, reason);
-        } else if (quadplane.options & QuadPlane::OPTION_FS_QRTL) {
+        } else if (quadplane.option_is_set(QuadPlane::OPTION::FS_QRTL)) {
             set_mode(mode_qrtl, reason);
         } else {
             set_mode(mode_qland, reason);
diff --git a/ArduPlane/mode_qloiter.cpp b/ArduPlane/mode_qloiter.cpp
index 7f480ae337..e7fd0dcb00 100644
--- a/ArduPlane/mode_qloiter.cpp
+++ b/ArduPlane/mode_qloiter.cpp
@@ -99,7 +99,7 @@ void ModeQLoiter::run()
         float height_above_ground = plane.relative_ground_altitude(plane.g.rangefinder_landing);
         float descent_rate_cms = quadplane.landing_descent_rate_cms(height_above_ground);
 
-        if (poscontrol.get_state() == QuadPlane::QPOS_LAND_FINAL && (quadplane.options & QuadPlane::OPTION_DISABLE_GROUND_EFFECT_COMP) == 0) {
+        if (poscontrol.get_state() == QuadPlane::QPOS_LAND_FINAL && !quadplane.option_is_set(QuadPlane::OPTION::DISABLE_GROUND_EFFECT_COMP)) {
             quadplane.ahrs.set_touchdown_expected(true);
         }
 
diff --git a/ArduPlane/mode_qstabilize.cpp b/ArduPlane/mode_qstabilize.cpp
index 8a5f9fef65..2c8da2d968 100644
--- a/ArduPlane/mode_qstabilize.cpp
+++ b/ArduPlane/mode_qstabilize.cpp
@@ -27,7 +27,7 @@ void ModeQStabilize::update()
         return;
     }
 
-    if ((plane.quadplane.options & QuadPlane::OPTION_INGORE_FW_ANGLE_LIMITS_IN_Q_MODES) == 0) {
+    if (!plane.quadplane.option_is_set(QuadPlane::OPTION::INGORE_FW_ANGLE_LIMITS_IN_Q_MODES)) {
         // by default angles are also constrained by forward flight limits
         set_limited_roll_pitch(roll_input, pitch_input);
     } else {
diff --git a/ArduPlane/navigation.cpp b/ArduPlane/navigation.cpp
index 42010eab8c..e8c2bb88ab 100644
--- a/ArduPlane/navigation.cpp
+++ b/ArduPlane/navigation.cpp
@@ -113,7 +113,7 @@ void Plane::navigate()
 float Plane::mode_auto_target_airspeed_cm()
 {
 #if HAL_QUADPLANE_ENABLED
-    if ((quadplane.options & QuadPlane::OPTION_MISSION_LAND_FW_APPROACH) &&
+    if (quadplane.option_is_set(QuadPlane::OPTION::MISSION_LAND_FW_APPROACH) &&
         ((vtol_approach_s.approach_stage == Landing_ApproachStage::APPROACH_LINE) ||
          (vtol_approach_s.approach_stage == Landing_ApproachStage::VTOL_LANDING))) {
         const float land_airspeed = TECS_controller.get_land_airspeed();
diff --git a/ArduPlane/quadplane.cpp b/ArduPlane/quadplane.cpp
index 1b53b4e9ae..e5f8e80b5d 100644
--- a/ArduPlane/quadplane.cpp
+++ b/ArduPlane/quadplane.cpp
@@ -762,7 +762,7 @@ bool QuadPlane::setup(void)
     hal.rcout->set_failsafe_pwm(mask, plane.quadplane.motors->get_pwm_output_min());
 
     // default QAssist state as set with Q_OPTIONS
-    if ((options & OPTION_Q_ASSIST_FORCE_ENABLE) != 0) {
+    if (option_is_set(QuadPlane::OPTION::Q_ASSIST_FORCE_ENABLE)) {
         q_assist_state = Q_ASSIST_STATE_ENUM::Q_ASSIST_FORCE;
     }
 
@@ -1190,7 +1190,7 @@ float QuadPlane::landing_descent_rate_cms(float height_above_ground)
                                    height_above_ground,
                                    land_final_alt, land_final_alt+6);
 
-    if ((options & OPTION_THR_LANDING_CONTROL) != 0) {
+    if (option_is_set(QuadPlane::OPTION::THR_LANDING_CONTROL)) {
         // allow throttle control for landing speed
         const float thr_in = get_pilot_land_throttle();
         if (thr_in > THR_CTRL_LAND_THRESH) {
@@ -1409,7 +1409,7 @@ bool QuadPlane::should_assist(float aspeed, bool have_airspeed)
     // assistance due to Q_ASSIST_SPEED
     // if option bit is enabled only allow assist with real airspeed sensor
     if ((have_airspeed && aspeed < assist_speed) && 
-       (((options & OPTION_DISABLE_SYNTHETIC_AIRSPEED_ASSIST) == 0) || ahrs.airspeed_sensor_enabled())) {
+       (!option_is_set(QuadPlane::OPTION::DISABLE_SYNTHETIC_AIRSPEED_ASSIST) || ahrs.airspeed_sensor_enabled())) {
         in_angle_assist = false;
         angle_error_start_ms = 0;
         return true;
@@ -1568,7 +1568,7 @@ void SLT_Transition::update()
             // if option is set and ground speed> 1/2 arspd_fbw_min for non-tiltrotors, then complete transition, otherwise QLAND.
             // tiltrotors will immediately transition
             const bool tiltrotor_with_ground_speed = quadplane.tiltrotor.enabled() && (plane.ahrs.groundspeed() > plane.aparm.airspeed_min * 0.5);
-            if ((quadplane.options & QuadPlane::OPTION_TRANS_FAIL_TO_FW) && tiltrotor_with_ground_speed) {
+            if (quadplane.option_is_set(QuadPlane::OPTION::TRANS_FAIL_TO_FW) && tiltrotor_with_ground_speed) {
                 transition_state = TRANSITION_TIMER;
                 in_forced_transition = true;
             } else {
@@ -1604,7 +1604,7 @@ void SLT_Transition::update()
         // otherwise the plane can end up in high-alpha flight with
         // low VTOL thrust and may not complete a transition
         float climb_rate_cms = quadplane.assist_climb_rate_cms();
-        if ((quadplane.options & QuadPlane::OPTION_LEVEL_TRANSITION) && !quadplane.tiltrotor.enabled()) {
+        if (quadplane.option_is_set(QuadPlane::OPTION::LEVEL_TRANSITION) && !quadplane.tiltrotor.enabled()) {
             climb_rate_cms = MIN(climb_rate_cms, 0.0f);
         }
         quadplane.hold_hover(climb_rate_cms);
@@ -1957,7 +1957,7 @@ void QuadPlane::motors_output(bool run_rate_controller)
        1) for safety (OPTION_DELAY_ARMING)
        2) to allow motors to return to vertical (OPTION_DISARMED_TILT)
      */
-    if ((options & OPTION_DISARMED_TILT) || (options & OPTION_DELAY_ARMING)) {
+    if (option_is_set(QuadPlane::OPTION::DISARMED_TILT) || option_is_set(QuadPlane::OPTION::DELAY_ARMING)) {
         if (plane.arming.get_delay_arming()) {
             // delay motor start after arming
             set_desired_spool_state(AP_Motors::DesiredSpoolState::SHUT_DOWN);
@@ -2143,7 +2143,7 @@ bool QuadPlane::in_vtol_posvel_mode(void) const
  */
 void QuadPlane::update_land_positioning(void)
 {
-    if ((options & OPTION_REPOSITION_LANDING) == 0) {
+    if (!option_is_set(QuadPlane::OPTION::REPOSITION_LANDING)) {
         // not enabled
         poscontrol.pilot_correction_active = false;
         poscontrol.target_vel_cms.zero();
@@ -2195,7 +2195,7 @@ void QuadPlane::run_xy_controller(float accel_limit)
 void QuadPlane::poscontrol_init_approach(void)
 {
     const float dist = plane.current_loc.get_distance(plane.next_WP_loc);
-    if ((options & OPTION_DISABLE_APPROACH) != 0) {
+    if (option_is_set(QuadPlane::OPTION::DISABLE_APPROACH)) {
         // go straight to QPOS_POSITION1
         poscontrol.set_state(QPOS_POSITION1);
         gcs().send_text(MAV_SEVERITY_INFO,"VTOL Position1 d=%.1f", dist);
@@ -2801,7 +2801,7 @@ void QuadPlane::vtol_position_controller(void)
     case QPOS_LAND_FINAL: {
         float height_above_ground = plane.relative_ground_altitude(plane.g.rangefinder_landing);
         if (poscontrol.get_state() == QPOS_LAND_FINAL) {
-            if ((options & OPTION_DISABLE_GROUND_EFFECT_COMP) == 0) {
+            if (!option_is_set(QuadPlane::OPTION::DISABLE_GROUND_EFFECT_COMP)) {
                 ahrs.set_touchdown_expected(true);
             }
         }
@@ -3070,7 +3070,7 @@ bool QuadPlane::do_vtol_takeoff(const AP_Mission::Mission_Command& cmd)
     loc.lat = 0;
     loc.lng = 0;
     plane.set_next_WP(loc);
-    if (options & OPTION_RESPECT_TAKEOFF_FRAME) {
+    if (option_is_set(QuadPlane::OPTION::RESPECT_TAKEOFF_FRAME)) {
         if (plane.current_loc.alt >= plane.next_WP_loc.alt) {
             // we are above the takeoff already, no need to do anything
             return false;
@@ -3164,7 +3164,7 @@ bool QuadPlane::verify_vtol_takeoff(const AP_Mission::Mission_Command &cmd)
     }
 
     if (now - takeoff_start_time_ms < 3000 &&
-        (options & OPTION_DISABLE_GROUND_EFFECT_COMP) == 0) {
+        !option_is_set(QuadPlane::OPTION::DISABLE_GROUND_EFFECT_COMP)) {
         ahrs.set_takeoff_expected(true);
     }
     
@@ -3657,7 +3657,7 @@ bool QuadPlane::do_user_takeoff(float takeoff_altitude)
     guided_start();
     guided_takeoff = true;
     guided_wait_takeoff = false;
-    if ((options & OPTION_DISABLE_GROUND_EFFECT_COMP) == 0) {
+    if (!option_is_set(QuadPlane::OPTION::DISABLE_GROUND_EFFECT_COMP)) {
         ahrs.set_takeoff_expected(true);
     }
     return true;
@@ -3691,7 +3691,7 @@ bool QuadPlane::is_vtol_takeoff(uint16_t id) const
     if (id == MAV_CMD_NAV_VTOL_TAKEOFF) {
         return true;
     }
-    if (id == MAV_CMD_NAV_TAKEOFF && available() && (options & OPTION_ALLOW_FW_TAKEOFF) == 0) {
+    if (id == MAV_CMD_NAV_TAKEOFF && available() && !option_is_set(QuadPlane::OPTION::ALLOW_FW_TAKEOFF)) {
         // treat fixed wing takeoff as VTOL takeoff
         return true;
     }
@@ -3704,13 +3704,13 @@ bool QuadPlane::is_vtol_takeoff(uint16_t id) const
 bool QuadPlane::is_vtol_land(uint16_t id) const
 {
     if (id == MAV_CMD_NAV_VTOL_LAND) {
-        if (options & QuadPlane::OPTION_MISSION_LAND_FW_APPROACH) {
+        if (option_is_set(QuadPlane::OPTION::MISSION_LAND_FW_APPROACH)) {
             return plane.vtol_approach_s.approach_stage == Plane::Landing_ApproachStage::VTOL_LANDING;
         } else {
             return true;
         }
     }
-    if (id == MAV_CMD_NAV_LAND && available() && (options & OPTION_ALLOW_FW_LAND) == 0) {
+    if (id == MAV_CMD_NAV_LAND && available() && !option_is_set(QuadPlane::OPTION::ALLOW_FW_LAND)) {
         // treat fixed wing land as VTOL land
         return true;
     }
@@ -4075,7 +4075,7 @@ QuadPlane *QuadPlane::_singleton = nullptr;
 bool SLT_Transition::set_FW_roll_limit(int32_t& roll_limit_cd)
 {
     if (quadplane.assisted_flight && (transition_state == TRANSITION_AIRSPEED_WAIT || transition_state == TRANSITION_TIMER) &&
-        (quadplane.options & QuadPlane::OPTION_LEVEL_TRANSITION)) {
+        quadplane.option_is_set(QuadPlane::OPTION::LEVEL_TRANSITION)) {
         // the user wants transitions to be kept level to within LEVEL_ROLL_LIMIT
         roll_limit_cd = MIN(roll_limit_cd, plane.g.level_roll_limit*100);
         return true;
@@ -4290,7 +4290,7 @@ bool QuadPlane::allow_servo_auto_trim()
         // In forward flight and VTOL motors not active
         return true;
     }
-    if (tailsitter.enabled() && ((options & QuadPlane::OPTION_TAILSIT_Q_ASSIST_MOTORS_ONLY) != 0)) {
+    if (tailsitter.enabled() && option_is_set(QuadPlane::OPTION::TAILSIT_Q_ASSIST_MOTORS_ONLY)) {
         // Tailsitter in forward flight, motors providing active stabalisation with motors only option
         // Control surfaces are running as normal with I term active, motor I term is zeroed
         return true;
diff --git a/ArduPlane/quadplane.h b/ArduPlane/quadplane.h
index ec1591a158..0295e42a8f 100644
--- a/ArduPlane/quadplane.h
+++ b/ArduPlane/quadplane.h
@@ -535,29 +535,32 @@ private:
 
     // additional options
     AP_Int32 options;
-    enum {
-        OPTION_LEVEL_TRANSITION=(1<<0),
-        OPTION_ALLOW_FW_TAKEOFF=(1<<1),
-        OPTION_ALLOW_FW_LAND=(1<<2),
-        OPTION_RESPECT_TAKEOFF_FRAME=(1<<3),
-        OPTION_MISSION_LAND_FW_APPROACH=(1<<4),
-        OPTION_FS_QRTL=(1<<5),
-        OPTION_IDLE_GOV_MANUAL=(1<<6),
-        OPTION_Q_ASSIST_FORCE_ENABLE=(1<<7),
-        OPTION_TAILSIT_Q_ASSIST_MOTORS_ONLY=(1<<8),
-        OPTION_AIRMODE_UNUSED=(1<<9),
-        OPTION_DISARMED_TILT=(1<<10),
-        OPTION_DELAY_ARMING=(1<<11),
-        OPTION_DISABLE_SYNTHETIC_AIRSPEED_ASSIST=(1<<12),
-        OPTION_DISABLE_GROUND_EFFECT_COMP=(1<<13),
-        OPTION_INGORE_FW_ANGLE_LIMITS_IN_Q_MODES=(1<<14),
-        OPTION_THR_LANDING_CONTROL=(1<<15),
-        OPTION_DISABLE_APPROACH=(1<<16),
-        OPTION_REPOSITION_LANDING=(1<<17),
-        OPTION_ONLY_ARM_IN_QMODE_OR_AUTO=(1<<18),
-        OPTION_TRANS_FAIL_TO_FW=(1<<19),
-        OPTION_FS_RTL=(1<<20),
+    enum class OPTION {
+        LEVEL_TRANSITION=(1<<0),
+        ALLOW_FW_TAKEOFF=(1<<1),
+        ALLOW_FW_LAND=(1<<2),
+        RESPECT_TAKEOFF_FRAME=(1<<3),
+        MISSION_LAND_FW_APPROACH=(1<<4),
+        FS_QRTL=(1<<5),
+        IDLE_GOV_MANUAL=(1<<6),
+        Q_ASSIST_FORCE_ENABLE=(1<<7),
+        TAILSIT_Q_ASSIST_MOTORS_ONLY=(1<<8),
+        AIRMODE_UNUSED=(1<<9),
+        DISARMED_TILT=(1<<10),
+        DELAY_ARMING=(1<<11),
+        DISABLE_SYNTHETIC_AIRSPEED_ASSIST=(1<<12),
+        DISABLE_GROUND_EFFECT_COMP=(1<<13),
+        INGORE_FW_ANGLE_LIMITS_IN_Q_MODES=(1<<14),
+        THR_LANDING_CONTROL=(1<<15),
+        DISABLE_APPROACH=(1<<16),
+        REPOSITION_LANDING=(1<<17),
+        ONLY_ARM_IN_QMODE_OR_AUTO=(1<<18),
+        TRANS_FAIL_TO_FW=(1<<19),
+        FS_RTL=(1<<20),
     };
+    bool option_is_set(OPTION option) const {
+        return (options.get() & int32_t(option)) != 0;
+    }
 
     AP_Float takeoff_failure_scalar;
     AP_Float maximum_takeoff_airspeed;
diff --git a/ArduPlane/servos.cpp b/ArduPlane/servos.cpp
index dbaa207fc8..03fc39115c 100644
--- a/ArduPlane/servos.cpp
+++ b/ArduPlane/servos.cpp
@@ -388,7 +388,7 @@ void Plane::set_servos_manual_passthrough(void)
     SRV_Channels::set_output_scaled(SRV_Channel::k_throttle, throttle);
 
 #if HAL_QUADPLANE_ENABLED
-    if (quadplane.available() && (quadplane.options & QuadPlane::OPTION_IDLE_GOV_MANUAL)) {
+    if (quadplane.available() && quadplane.option_is_set(QuadPlane::OPTION::IDLE_GOV_MANUAL)) {
         // for quadplanes it can be useful to run the idle governor in MANUAL mode
         // as it prevents the VTOL motors from running
         int8_t min_throttle = aparm.throttle_min.get();
diff --git a/ArduPlane/system.cpp b/ArduPlane/system.cpp
index eac7fb238f..91b96b7455 100644
--- a/ArduPlane/system.cpp
+++ b/ArduPlane/system.cpp
@@ -36,7 +36,7 @@ void Plane::init_ardupilot()
 
     // initialise rc channels including setting mode
 #if HAL_QUADPLANE_ENABLED
-    rc().convert_options(RC_Channel::AUX_FUNC::ARMDISARM_UNUSED, (quadplane.enabled() && (quadplane.options & QuadPlane::OPTION_AIRMODE_UNUSED) && (rc().find_channel_for_option(RC_Channel::AUX_FUNC::AIRMODE) == nullptr)) ? RC_Channel::AUX_FUNC::ARMDISARM_AIRMODE : RC_Channel::AUX_FUNC::ARMDISARM);
+    rc().convert_options(RC_Channel::AUX_FUNC::ARMDISARM_UNUSED, (quadplane.enabled() && quadplane.option_is_set(QuadPlane::OPTION::AIRMODE_UNUSED) && (rc().find_channel_for_option(RC_Channel::AUX_FUNC::AIRMODE) == nullptr)) ? RC_Channel::AUX_FUNC::ARMDISARM_AIRMODE : RC_Channel::AUX_FUNC::ARMDISARM);
 #else
     rc().convert_options(RC_Channel::AUX_FUNC::ARMDISARM_UNUSED, RC_Channel::AUX_FUNC::ARMDISARM);
 #endif
diff --git a/ArduPlane/tailsitter.cpp b/ArduPlane/tailsitter.cpp
index 62c7c9cbdc..2a099c4f68 100644
--- a/ArduPlane/tailsitter.cpp
+++ b/ArduPlane/tailsitter.cpp
@@ -236,7 +236,7 @@ void Tailsitter::setup()
 
         // Do not allow arming in forward flight modes
         // motors will become active due to assisted flight airmode, the vehicle will try very hard to get level
-        quadplane.options.set(quadplane.options.get() | QuadPlane::OPTION_ONLY_ARM_IN_QMODE_OR_AUTO);
+        quadplane.options.set(quadplane.options.get() | int32_t(QuadPlane::OPTION::ONLY_ARM_IN_QMODE_OR_AUTO));
     }
 
     transition = new Tailsitter_Transition(quadplane, motors, *this);
@@ -361,7 +361,7 @@ void Tailsitter::output(void)
         quadplane.hold_stabilize(throttle);
         quadplane.motors_output(true);
 
-        if ((quadplane.options & QuadPlane::OPTION_TAILSIT_Q_ASSIST_MOTORS_ONLY) != 0) {
+        if (quadplane.option_is_set(QuadPlane::OPTION::TAILSIT_Q_ASSIST_MOTORS_ONLY)) {
             // only use motors for Q assist, control surfaces remain under plane control
             // zero copter I terms and use plane
             quadplane.attitude_control->reset_rate_controller_I_terms();
diff --git a/ArduPlane/tiltrotor.cpp b/ArduPlane/tiltrotor.cpp
index d9986fb491..bbd1e56cc4 100644
--- a/ArduPlane/tiltrotor.cpp
+++ b/ArduPlane/tiltrotor.cpp
@@ -508,7 +508,7 @@ void Tiltrotor::vectoring(void)
     // Wait TILT_DELAY_MS after disarming to allow props to spin down first.
     constexpr uint32_t TILT_DELAY_MS = 3000;
     uint32_t now = AP_HAL::millis();
-    if (!hal.util->get_soft_armed() && (plane.quadplane.options & QuadPlane::OPTION_DISARMED_TILT)) {
+    if (!hal.util->get_soft_armed() && plane.quadplane.option_is_set(QuadPlane::OPTION::DISARMED_TILT)) {
         // this test is subject to wrapping at ~49 days, but the consequences are insignificant
         if ((now - hal.util->get_last_armed_change()) > TILT_DELAY_MS) {
             if (quadplane.in_vtol_mode()) {