diff --git a/src/querystring_gui.h b/src/querystring_gui.h
--- a/src/querystring_gui.h
+++ b/src/querystring_gui.h
@@ -86,5 +86,6 @@ struct QueryStringBaseWindow : public Wi
 };
 
 void ShowOnScreenKeyboard(QueryStringBaseWindow *parent, int button, int cancel, int ok);
+void UpdateOSKOriginalText(const QueryStringBaseWindow *parent, int button);
 
 #endif /* QUERYSTRING_GUI_H */