diff --git a/Xext/bigreq.c b/Xext/bigreq.c
index 2e3247b961..7a73b45473 100644
--- a/Xext/bigreq.c
+++ b/Xext/bigreq.c
@@ -45,8 +45,7 @@ from The Open Group.
 static int
 ProcBigReqDispatch(ClientPtr client)
 {
-    REQUEST(xBigReqEnableReq);
-    REQUEST_SIZE_MATCH(xBigReqEnableReq);
+    X_REQUEST_HEAD_STRUCT(xBigReqEnableReq);
 
     if (stuff->brReqType != X_BigReqEnable)
         return BadRequest;