diff --git a/deluge/ui/web/js/deluge-all/UI.js b/deluge/ui/web/js/deluge-all/UI.js
index b4305c06f..08774afc2 100644
--- a/deluge/ui/web/js/deluge-all/UI.js
+++ b/deluge/ui/web/js/deluge-all/UI.js
@@ -256,7 +256,7 @@ deluge.ui = {
     },
 
     onPluginDisabled: function(pluginName) {
-        deluge.plugins[pluginName].disable();
+        if (deluge.plugins[pluginName]) deluge.plugins[pluginName].disable();
     },
 
     onPluginLoaded: function(options) {