diff --git a/evennia/web/webclient/static/webclient/js/evennia.js b/evennia/web/webclient/static/webclient/js/evennia.js
index f5d2dabe34..328a2a1bf8 100644
--- a/evennia/web/webclient/static/webclient/js/evennia.js
+++ b/evennia/web/webclient/static/webclient/js/evennia.js
@@ -124,7 +124,9 @@ An "emitter" object must have a function
             if (!cmdname) {
                 return;
             }
-            kwargs.cmdid = cmdid++;
+            if (kwargs) {
+                kwargs.cmdid = cmdid++;
+            }
             var outargs = args ? args : [];
             var outkwargs = kwargs ? kwargs : {};
             var data = [cmdname, outargs, outkwargs];