diff --git a/hw/xgl/xgl.h b/hw/xgl/xgl.h
index eae94a1ac..bf463bd48 100644
--- a/hw/xgl/xgl.h
+++ b/hw/xgl/xgl.h
@@ -320,6 +320,7 @@ extern int xglGCPrivateIndex;
 #define xglPCFilterMask		(1L << 1)
 #define xglPCTransformMask 	(1L << 2)
 #define xglPCComponentAlphaMask (1L << 3)
+#define xglPCDitherMask		(1L << 4)
 
 #define xglPFFilterMask		(1L << 8)
 
diff --git a/hw/xgl/xglcomp.c b/hw/xgl/xglcomp.c
index 3783af97c..3d153f34c 100644
--- a/hw/xgl/xglcomp.c
+++ b/hw/xgl/xglcomp.c
@@ -71,9 +71,6 @@ xglComp (CARD8		 op,
     RegionRec	    region;
     BoxPtr	    pBox;
     int		    nBox;
-
-    if (pDst->dither != None)
-	return FALSE;
     
     if (pDst->alphaMap)
 	return FALSE;
diff --git a/hw/xgl/xglpict.c b/hw/xgl/xglpict.c
index 90f1c900e..dcb1f485f 100644
--- a/hw/xgl/xglpict.c
+++ b/hw/xgl/xglpict.c
@@ -164,6 +164,9 @@ xglChangePicture (PicturePtr pPicture,
     if (pPicture->stateChanges & CPComponentAlpha)
 	pPixmapPriv->pictureMask |= xglPCComponentAlphaMask;
 
+    if (pPicture->stateChanges & CPDither)
+	pPixmapPriv->pictureMask |= xglPCDitherMask;
+
     XGL_PICTURE_SCREEN_UNWRAP (ChangePicture);
     (*pPictureScreen->ChangePicture) (pPicture, mask);
     XGL_PICTURE_SCREEN_WRAP (ChangePicture, xglChangePicture);
@@ -269,6 +272,14 @@ xglUpdatePicture (PicturePtr pPicture)
 	    glitz_surface_set_component_alpha (surface, 0);
     }
 
+    if (pPixmapPriv->pictureMask & xglPCDitherMask)
+    {
+	if (pPicture->dither)
+	    glitz_surface_set_dither (surface, 1);
+	else
+	    glitz_surface_set_dither (surface, 0);
+    }
+
     pPixmapPriv->pictureMask &= ~XGL_PICTURE_CHANGES (~0);
 }