diff --git a/lib/yui/formchangechecker/formchangechecker.js b/lib/yui/formchangechecker/formchangechecker.js
index ea5164d2742..84ffb399459 100644
--- a/lib/yui/formchangechecker/formchangechecker.js
+++ b/lib/yui/formchangechecker/formchangechecker.js
@@ -17,6 +17,11 @@ YUI.add('moodle-core-formchangechecker',
                 initializer : function(config) {
                     var formid = 'form#' + this.get('formid');
 
+                    if (!currentform) {
+                        // If the form was not found, then we can't check for changes.
+                        return;
+                    }
+
                     // Add change events to the form elements
                     Y.all(formid + ' input').once('change', M.core_formchangechecker.set_form_changed, this);
                     Y.all(formid + ' textarea').once('change', M.core_formchangechecker.set_form_changed, this);