diff --git a/sw/airborne/arch/stm32/servos_direct_hw.h b/sw/airborne/arch/stm32/servos_direct_hw.h
index 96302e8ad3..f9eca30fd5 100644
--- a/sw/airborne/arch/stm32/servos_direct_hw.h
+++ b/sw/airborne/arch/stm32/servos_direct_hw.h
@@ -4,11 +4,10 @@
 
 #include "std.h"
 
-#define ACTUATORS_PWM_NB 6
-extern int32_t actuators_pwm_values[ACTUATORS_PWM_NB];
-
 #include "actuators_pwm_arch.h"
 
+extern int32_t actuators_pwm_values[ACTUATORS_PWM_NB];
+
 #define SERVOS_TICS_OF_USEC(_v) (_v)
 #define Actuator(_x)  actuators_pwm_values[_x]
 //#define ChopServo(x,a,b) Chop(x, a, b)