diff --git a/hw/dmx/dmxwindow.c b/hw/dmx/dmxwindow.c
index 9733a2d36..64a041f7d 100644
--- a/hw/dmx/dmxwindow.c
+++ b/hw/dmx/dmxwindow.c
@@ -272,7 +272,7 @@ static Window dmxCreateNonRootWindow(WindowPtr pWindow)
     }
 
     mask |= CWEventMask;
-    attribs.event_mask = dmxScreen->rootEventMask;
+    attribs.event_mask = ExposureMask | SubstructureRedirectMask;
 
     /* Incorporate new attributes, if needed */
     if (pWinPriv->attribMask) {