diff --git a/hw/xnest/Window.c b/hw/xnest/Window.c
index 0d5f82c8b..fd52654b8 100644
--- a/hw/xnest/Window.c
+++ b/hw/xnest/Window.c
@@ -86,7 +86,7 @@ xnestCreateWindow(WindowPtr pWin)
     }
     else {
         mask = XCB_CW_EVENT_MASK | XCB_CW_BACKING_STORE;
-        attributes.event_mask = ExposureMask;
+        attributes.event_mask = XCB_EVENT_MASK_EXPOSURE;
         attributes.backing_store = XCB_BACKING_STORE_NOT_USEFUL;
 
         if (pWin->parent) {