diff --git a/libraries/RC_Channel/examples/RC_Channel/RC_Channel.cpp b/libraries/RC_Channel/examples/RC_Channel/RC_Channel.cpp
index 233457573e..5777c838a0 100644
--- a/libraries/RC_Channel/examples/RC_Channel/RC_Channel.cpp
+++ b/libraries/RC_Channel/examples/RC_Channel/RC_Channel.cpp
@@ -37,7 +37,7 @@ public:
 
 protected:
 
-    int8_t flight_mode_channel_number() const { return 5; }
+    int8_t flight_mode_channel_number() const override { return 5; }
 
 private: