diff --git a/demo/chatdialog.h b/demo/chatdialog.h
index 252144b..ea95873 100644
--- a/demo/chatdialog.h
+++ b/demo/chatdialog.h
@@ -32,6 +32,7 @@
   void resizeEvent(QResizeEvent *);
   void showEvent(QShowEvent *);
   void fitView();
+  void testDraw();
 
 private slots:
   void returnPressed();