diff --git a/vncviewer/DesktopWindow.h b/vncviewer/DesktopWindow.h
index 9378d7b..ec7b05b 100644
--- a/vncviewer/DesktopWindow.h
+++ b/vncviewer/DesktopWindow.h
@@ -65,6 +65,8 @@
     viewport->copyRect(r, srcX, srcY);
   }
 
+  void resizeFramebuffer(int new_w, int new_h);
+
   // Fl_Window callback methods
   void resize(int x, int y, int w, int h);
 
@@ -76,6 +78,8 @@
 
   static void handleGrab(void *data);
 
+  void repositionViewport();
+
   static void handleClose(Fl_Widget *wnd, void *data);
 
   static void handleOptions(void *data);