diff --git a/olark.js b/olark.js
index 460bf58..4d816a2 100755
--- a/olark.js
+++ b/olark.js
@@ -1,7 +1,7 @@
 // $Id:
 
 Drupal.behaviors.olark = function() {
-  if (typeof Drupal.settings.olark.uid != 'undefined') {
+  if ((typeof olark == 'function') && (typeof Drupal.settings.olark.uid != 'undefined')) {
     olark.extend(function(api){
       api.chat.updateVisitorNickname({
         snippet: Drupal.settings.olark.name,