diff --git a/unix/x0vncserver/XPixelBuffer.h b/unix/x0vncserver/XPixelBuffer.h
index 7829038..25a3d84 100644
--- a/unix/x0vncserver/XPixelBuffer.h
+++ b/unix/x0vncserver/XPixelBuffer.h
@@ -36,9 +36,7 @@
 {
 public:
   XPixelBuffer(Display *dpy, ImageFactory &factory,
-               int offsetLeft, int offsetTop,
-               int width, int height,
-               ColourMap* cm);
+               const Rect &rect, ColourMap* cm);
   virtual ~XPixelBuffer();
 
   // We allow public access to the underlying Image object.