diff --git a/src/drivers/px4fmu/fmu.cpp b/src/drivers/px4fmu/fmu.cpp
index 37e9b08d89..85656e5515 100644
--- a/src/drivers/px4fmu/fmu.cpp
+++ b/src/drivers/px4fmu/fmu.cpp
@@ -1693,6 +1693,7 @@ PX4FMU::pwm_ioctl(file *filp, int cmd, unsigned long arg)
 			break;
 		}
 
+	/* FALLTHROUGH */
 	case PWM_SERVO_GET(4):
 		if (_mode < MODE_5PWM1CAP) {
 			ret = -EINVAL;