diff --git a/lib/yui/formchangechecker/formchangechecker.js b/lib/yui/formchangechecker/formchangechecker.js
index ea5164d2742..4d78b140be3 100644
--- a/lib/yui/formchangechecker/formchangechecker.js
+++ b/lib/yui/formchangechecker/formchangechecker.js
@@ -16,6 +16,9 @@ YUI.add('moodle-core-formchangechecker',
                  */
                 initializer : function(config) {
                     var formid = 'form#' + this.get('formid');
+                    if (!Y.one(formid)) {
+                        return;
+                    }
 
                     // Add change events to the form elements
                     Y.all(formid + ' input').once('change', M.core_formchangechecker.set_form_changed, this);