diff --git a/contrib/include/wx/gizmos/statpict.h b/contrib/include/wx/gizmos/statpict.h
index 942d6d2b6b..a9ce912a26 100644
--- a/contrib/include/wx/gizmos/statpict.h
+++ b/contrib/include/wx/gizmos/statpict.h
@@ -109,7 +109,7 @@ public:
         ScaleY = sy;
     }
 
-    int GetCustomScale( float* sx, float* sy ) const
+    void GetCustomScale( float* sx, float* sy ) const
     {
         *sx = ScaleX;
         *sy = ScaleY;