diff --git a/unix/x0vncserver/PollingManager.h b/unix/x0vncserver/PollingManager.h
index b8eef50..64a18ae 100644
--- a/unix/x0vncserver/PollingManager.h
+++ b/unix/x0vncserver/PollingManager.h
@@ -120,6 +120,8 @@
 
   void adjustVideoArea();
 
+  void getVideoAreaRect(Rect *result);
+
   // Additional images used in polling algorithms.
   Image *m_rowImage;            // One row of the framebuffer
   Image *m_tileImage;           // One tile (32x32 or less)