diff --git a/apps/px4io/mixer.cpp b/apps/px4io/mixer.cpp
index c24cb8e52c..8e00781a09 100644
--- a/apps/px4io/mixer.cpp
+++ b/apps/px4io/mixer.cpp
@@ -144,7 +144,7 @@ mixer_tick(void)
 				rc_channel_data[THROTTLE] = 1000;
 			}
 			
-			// lib_lowprintf("Tmin: %d Ttrim: %d Tmax: %d T: %d \n",
+			// lowsyslog("Tmin: %d Ttrim: %d Tmax: %d T: %d \n",
 			// 	(int)(system_state.rc_min[THROTTLE]), (int)(system_state.rc_trim[THROTTLE]),
 			// 	(int)(system_state.rc_max[THROTTLE]), (int)(rc_channel_data[THROTTLE]));
 
@@ -156,7 +156,7 @@ mixer_tick(void)
 			// XXX builtin failsafe would activate here
 			control_count = 0;
 		}
-		//lib_lowprintf("R: %d P: %d Y: %d T: %d \n", control_values[0], control_values[1], control_values[2], control_values[3]);
+		//lowsyslog("R: %d P: %d Y: %d T: %d \n", control_values[0], control_values[1], control_values[2], control_values[3]);
 
 	/* this is for multicopters, etc. where manual override does not make sense */
 	} else {
diff --git a/apps/systemlib/mixer/mixer_group.cpp b/apps/systemlib/mixer/mixer_group.cpp
index 25d19f9ade..60eeff2256 100644
--- a/apps/systemlib/mixer/mixer_group.cpp
+++ b/apps/systemlib/mixer/mixer_group.cpp
@@ -56,7 +56,7 @@
 #define debug(fmt, args...)	do { } while(0)
 //#define debug(fmt, args...)	do { printf("[mixer] " fmt "\n", ##args); } while(0)
 //#include <debug.h>
-//#define debug(fmt, args...)	lib_lowprintf(fmt "\n", ##args)
+//#define debug(fmt, args...)	lowsyslog(fmt "\n", ##args)
 
 MixerGroup::MixerGroup(ControlCallback control_cb, uintptr_t cb_handle) :
 	Mixer(control_cb, cb_handle),
diff --git a/apps/systemlib/mixer/mixer_multirotor.cpp b/apps/systemlib/mixer/mixer_multirotor.cpp
index f6e91b1bf9..4b9cfc023a 100644
--- a/apps/systemlib/mixer/mixer_multirotor.cpp
+++ b/apps/systemlib/mixer/mixer_multirotor.cpp
@@ -57,7 +57,7 @@
 #define debug(fmt, args...)	do { } while(0)
 //#define debug(fmt, args...)	do { printf("[mixer] " fmt "\n", ##args); } while(0)
 //#include <debug.h>
-//#define debug(fmt, args...)	lib_lowprintf(fmt "\n", ##args)
+//#define debug(fmt, args...)	lowsyslog(fmt "\n", ##args)
 
 /*
  * Clockwise: 1
@@ -217,11 +217,11 @@ unsigned
 MultirotorMixer::mix(float *outputs, unsigned space)
 {
 	float		roll    = get_control(0, 0) * _roll_scale;
-	//lib_lowprintf("roll: %d, get_control0: %d, %d\n", (int)(roll), (int)(get_control(0, 0)), (int)(_roll_scale));
+	//lowsyslog("roll: %d, get_control0: %d, %d\n", (int)(roll), (int)(get_control(0, 0)), (int)(_roll_scale));
 	float		pitch   = get_control(0, 1) * _pitch_scale;
 	float		yaw     = get_control(0, 2) * _yaw_scale;
 	float		thrust  = get_control(0, 3);
-	//lib_lowprintf("thrust: %d, get_control3: %d\n", (int)(thrust), (int)(get_control(0, 3)));
+	//lowsyslog("thrust: %d, get_control3: %d\n", (int)(thrust), (int)(get_control(0, 3)));
 	float		max     = 0.0f;
 	float		fixup_scale;