diff --git a/src/drivers/px4fmu/fmu.cpp b/src/drivers/px4fmu/fmu.cpp
index a8af4ed06c..5e1b6212a8 100644
--- a/src/drivers/px4fmu/fmu.cpp
+++ b/src/drivers/px4fmu/fmu.cpp
@@ -470,7 +470,9 @@ PX4FMU::~PX4FMU()
 	/* make sure servos are off */
 	up_pwm_servo_deinit();
 
+#ifdef RC_SERIAL_PORT
 	dsm_deinit();
+#endif
 
 	/* note - someone else is responsible for restoring the GPIO config */