diff --git a/unix/x0vncserver/XPixelBuffer.h b/unix/x0vncserver/XPixelBuffer.h
index b909bb8..75cd552 100644
--- a/unix/x0vncserver/XPixelBuffer.h
+++ b/unix/x0vncserver/XPixelBuffer.h
@@ -37,7 +37,7 @@
 public:
   XPixelBuffer(Display *dpy, Image* image,
                int offsetLeft, int offsetTop,
-               const PixelFormat& pf, ColourMap* cm);
+               ColourMap* cm);
   virtual ~XPixelBuffer();
 
   // We allow public access to the underlying Image object.