diff --git a/demo/chatdialog.h b/demo/chatdialog.h
index 452fc2e..312ebb0 100644
--- a/demo/chatdialog.h
+++ b/demo/chatdialog.h
@@ -41,6 +41,7 @@
 private slots:
   void returnPressed();
   void buttonPressed();
+  void checkSetting();
   void settingUpdated(QString, QString, QString);
 
 signals: