diff --git a/lib/yui/formchangechecker/formchangechecker.js b/lib/yui/formchangechecker/formchangechecker.js
index 033cd7d6c10..035158559b4 100644
--- a/lib/yui/formchangechecker/formchangechecker.js
+++ b/lib/yui/formchangechecker/formchangechecker.js
@@ -18,6 +18,11 @@ YUI.add('moodle-core-formchangechecker',
                     var formid = 'form#' + this.get('formid'),
                         currentform = Y.one(formid);
 
+                    if (!currentform) {
+                        // If the form was not found, then we can't check for changes.
+                        return;
+                    }
+
                     // Add change events to the form elements
                     currentform.delegate('change', M.core_formchangechecker.set_form_changed, 'input', this);
                     currentform.delegate('change', M.core_formchangechecker.set_form_changed, 'textarea', this);