diff --git a/webroot/config/networking/port/ui/js/models/portModel.js b/webroot/config/networking/port/ui/js/models/portModel.js
index d8cbd265f..63bd39c1e 100644
--- a/webroot/config/networking/port/ui/js/models/portModel.js
+++ b/webroot/config/networking/port/ui/js/models/portModel.js
@@ -575,7 +575,7 @@ define([
             }
         },
         // Function to update the routing Instance when the network is changed
-        updateMirrorRoutingInterface(portModel, newValue) {
+        updateMirrorRoutingInterface: function(portModel, newValue) {
             var vnName = newValue.split(":");
             vnName = getValueByJsonPath(vnName, "2");
             portModel.mirrorToRoutingInstance(newValue+":"+vnName);