diff --git a/Xext/xvdisp.c b/Xext/xvdisp.c
index deddebd4b..72f79585c 100644
--- a/Xext/xvdisp.c
+++ b/Xext/xvdisp.c
@@ -1265,7 +1265,7 @@ ProcXvDispatch(ClientPtr client)
 
   UpdateCurrentTime();
 
-  if (stuff->data > xvNumRequests) {
+  if (stuff->data >= xvNumRequests) {
     SendErrorToClient(client, XvReqCode, stuff->data, 0, BadRequest);
     return BadRequest;
   }
@@ -1589,7 +1589,7 @@ SProcXvDispatch(ClientPtr client)
 
   UpdateCurrentTime();
 
-  if (stuff->data > xvNumRequests) {
+  if (stuff->data >= xvNumRequests) {
     SendErrorToClient(client, XvReqCode, stuff->data, 0, BadRequest);
     return BadRequest;
   }