diff --git a/x0vncserver/PollingManager.h b/x0vncserver/PollingManager.h
index 253c237..8f7f820 100644
--- a/x0vncserver/PollingManager.h
+++ b/x0vncserver/PollingManager.h
@@ -61,6 +61,10 @@
   int m_widthTiles;
   int m_heightTiles;
 
+private:
+
+  void adjustVideoArea();
+
   Image *m_rowImage;
   Image *m_tileImage;