diff --git a/libraries/AP_HAL/SIMState.h b/libraries/AP_HAL/SIMState.h
index 91a7c8fb66..0f537c0262 100644
--- a/libraries/AP_HAL/SIMState.h
+++ b/libraries/AP_HAL/SIMState.h
@@ -63,7 +63,7 @@ public:
     void set_gps0(SITL::GPS *_gps) { gps[0] = _gps; }
 #endif
 
-    uint16_t pwm_output[16];  // was SITL_NUM_CHANNELS
+    uint16_t pwm_output[32];  // was SITL_NUM_CHANNELS
 
 private:
     void _set_param_default(const char *parm);
@@ -212,6 +212,8 @@ private:
 
     const char *_home_str;
 
+    uint32_t wind_start_delay_micros;
+
 #if HAL_SIM_GPS_ENABLED
     // simulated GPS devices
     SITL::GPS *gps[2];  // constrained by # of parameter sets