diff --git a/xkb/xkb.c b/xkb/xkb.c
index bfc21de00..820cd7166 100644
--- a/xkb/xkb.c
+++ b/xkb/xkb.c
@@ -2511,16 +2511,15 @@ _XkbSetMapChecks(ClientPtr client, DeviceIntPtr dev, xkbSetMapReq * req,
         }
     }
 
-    if (!(req->present & XkbKeyTypesMask)) {
-        nTypes = xkb->map->num_types;
-    }
-    else if (!CheckKeyTypes(client, xkb, req, (xkbKeyTypeWireDesc **) &values,
-			       &nTypes, mapWidths, doswap)) {
+    /* nTypes/mapWidths/symsPerKey must be filled for further tests below,
+     * regardless of client-side flags */
+
+    if (!CheckKeyTypes(client, xkb, req, (xkbKeyTypeWireDesc **) &values,
+		       &nTypes, mapWidths, doswap)) {
 	    client->errorValue = nTypes;
 	    return BadValue;
     }
 
-    /* symsPerKey/mapWidths must be filled regardless of client-side flags */
     map = &xkb->map->key_sym_map[xkb->min_key_code];
     for (i = xkb->min_key_code; i < xkb->max_key_code; i++, map++) {
         register int g, ng, w;