diff --git a/sw/airborne/arch/stm32/subsystems/radio_control/spektrum_arch.c b/sw/airborne/arch/stm32/subsystems/radio_control/spektrum_arch.c
index f8c54736b2..0234b33c41 100644
--- a/sw/airborne/arch/stm32/subsystems/radio_control/spektrum_arch.c
+++ b/sw/airborne/arch/stm32/subsystems/radio_control/spektrum_arch.c
@@ -35,6 +35,8 @@
 // for timer_get_frequency
 #include "mcu_arch.h"
 
+INFO("Radio-Control now follows PPRZ sign convention: this means you might need to reverese some channels in your transmitter: RollRight / PitchUp / YawRight / FullThrottle / Auto2 are positive deflections")
+
 // for Min macro
 #include "std.h"
 
diff --git a/sw/airborne/subsystems/radio_control/superbitrf_rc.c b/sw/airborne/subsystems/radio_control/superbitrf_rc.c
index f71d94dd4f..b8bb946e89 100644
--- a/sw/airborne/subsystems/radio_control/superbitrf_rc.c
+++ b/sw/airborne/subsystems/radio_control/superbitrf_rc.c
@@ -26,6 +26,8 @@
 #include "superbitrf_rc.h"
 #include "subsystems/radio_control.h"
 
+INFO("Radio-Control now follows PPRZ sign convention: this means you might need to reverese some channels in your transmitter: RollRight / PitchUp / YawRight / FullThrottle / Auto2 are positive deflections")
+
 /**
  * Initialization
  */