diff --git a/wp-includes/js/tinymce/plugins/wordpress/editor_plugin.js b/wp-includes/js/tinymce/plugins/wordpress/editor_plugin.js
index fce3605253..cd4c71e22b 100644
--- a/wp-includes/js/tinymce/plugins/wordpress/editor_plugin.js
+++ b/wp-includes/js/tinymce/plugins/wordpress/editor_plugin.js
@@ -133,7 +133,7 @@
 			});
 
             // Word count if script is loaded
-            if ( 'undefined' != wpWordCount ) {
+            if ( 'undefined' != typeof wpWordCount ) {
                 var last = 0;
                 ed.onKeyUp.add(function(ed, e) {
                     if ( e.keyCode == last ) return;