diff --git a/Xext/sync.c b/Xext/sync.c
index 262f3f3c0..8da5bf616 100644
--- a/Xext/sync.c
+++ b/Xext/sync.c
@@ -2319,6 +2319,7 @@ SProcSyncCreateFence(ClientPtr client)
     REQUEST(xSyncCreateFenceReq);
     swaps(&stuff->length);
     REQUEST_SIZE_MATCH(xSyncCreateFenceReq);
+    swapl(&stuff->d);
     swapl(&stuff->fid);
 
     return ProcSyncCreateFence(client);