diff --git a/Blimp/Blimp.h b/Blimp/Blimp.h
index 568cd4708e..cab5e45a06 100644
--- a/Blimp/Blimp.h
+++ b/Blimp/Blimp.h
@@ -416,8 +416,6 @@ private:
     void read_rangefinder(void);
     bool rangefinder_alt_ok();
     bool rangefinder_up_ok();
-    void rpm_update();
-    void update_optical_flow(void);
 
     // RC_Channel.cpp
     void save_trim();