diff --git a/src/drivers/vmount/output_mavlink.h b/src/drivers/vmount/output_mavlink.h
index bdcc88de66..24c2272afa 100644
--- a/src/drivers/vmount/output_mavlink.h
+++ b/src/drivers/vmount/output_mavlink.h
@@ -56,7 +56,7 @@ class OutputMavlink : public OutputBase
 {
 public:
 	OutputMavlink(const OutputConfig &output_config);
-	~OutputMavlink();
+	virtual ~OutputMavlink();
 
 	virtual int update(const ControlData *control_data);