diff --git a/libraries/Filter/AverageFilter.h b/libraries/Filter/AverageFilter.h
index 31a14a277d..1939825119 100644
--- a/libraries/Filter/AverageFilter.h
+++ b/libraries/Filter/AverageFilter.h
@@ -36,7 +36,7 @@ public:
     virtual T        apply(T sample) override;
 
     // reset - clear the filter
-    virtual void        reset();
+    virtual void        reset() override;
 
 protected:
     // the number of samples in the filter, maxes out at size of the filter