diff --git a/vncviewer/DesktopWindow.h b/vncviewer/DesktopWindow.h
index 2be0768..0848306 100644
--- a/vncviewer/DesktopWindow.h
+++ b/vncviewer/DesktopWindow.h
@@ -72,6 +72,8 @@
   int handle(int event);
 
 private:
+  static int fltkHandle(int event, Fl_Window *win);
+
   void grabKeyboard();
   void ungrabKeyboard();