Index: xorg/render/render.c
===================================================================
RCS file: /cvs/xorg/xserver/xorg/render/render.c,v
retrieving revision 1.13
diff -p -u -r1.13 render.c
--- xorg/render/render.c	10 Feb 2006 22:00:30 -0000	1.13
+++ xorg/render/render.c	9 May 2006 07:44:06 -0000
@@ -747,7 +747,7 @@ ProcRenderComposite (ClientPtr client)
     VERIFY_ALPHA (pMask, stuff->mask, client, SecurityReadAccess, 
 		  RenderErrBase + BadPicture);
     if ((pSrc->pDrawable && pSrc->pDrawable->pScreen != pDst->pDrawable->pScreen) ||
-	(pMask && pMask->pDrawable && pSrc->pDrawable->pScreen != pMask->pDrawable->pScreen))
+	(pMask && pMask->pDrawable && pDst->pDrawable->pScreen != pMask->pDrawable->pScreen))
 	return BadMatch;
     CompositePicture (stuff->op,
 		      pSrc,