diff --git a/sw/airborne/subsystems/imu/imu_aspirin.h b/sw/airborne/subsystems/imu/imu_aspirin.h
index 701ee09f2d..e649cdbf83 100644
--- a/sw/airborne/subsystems/imu/imu_aspirin.h
+++ b/sw/airborne/subsystems/imu/imu_aspirin.h
@@ -107,7 +107,7 @@
 #define IMU_ACCEL_Y_SENS_NUM 3791
 #define IMU_ACCEL_Y_SENS_DEN 100
 #define IMU_ACCEL_Z_SENS 39.24
-#define IMU_ACCEL_Z_SENS_NUM 39.24
+#define IMU_ACCEL_Z_SENS_NUM 3924
 #define IMU_ACCEL_Z_SENS_DEN 100
 #endif
 #if !defined IMU_ACCEL_X_NEUTRAL & !defined IMU_ACCEL_Y_NEUTRAL & !defined IMU_ACCEL_Z_NEUTRAL