diff --git a/sw/airborne/math/pprz_algebra_int.h b/sw/airborne/math/pprz_algebra_int.h
index 3881f5f06c..8bff44719d 100644
--- a/sw/airborne/math/pprz_algebra_int.h
+++ b/sw/airborne/math/pprz_algebra_int.h
@@ -52,8 +52,6 @@ struct Int16Vect3 {
 #define INT32_SPEED_OF_CM_S_NUM 41943
 #define INT32_SPEED_OF_CM_S_DEN 8
 
-#define INT32_MAG_FRAC 11
-
 #define INT32_ACCEL_FRAC 10
 #define INT32_MAG_FRAC 11