diff --git a/indra/newview/llfloatermodelpreview.h b/indra/newview/llfloatermodelpreview.h
index d7fea67e60..c359722431 100644
--- a/indra/newview/llfloatermodelpreview.h
+++ b/indra/newview/llfloatermodelpreview.h
@@ -235,6 +235,7 @@ private:
 	void modelUpdated(bool calculate_visible);
 
 	// Toggles between "Calculate weights & fee" and "Upload" buttons.
+    void toggleCalculateButton();
 	void toggleCalculateButton(bool visible);
 
 	// resets display options of model preview to their defaults.