diff --git a/src/definitions/modules/nag.js b/src/definitions/modules/nag.js
index b669af746c..7c39daa4c6 100644
--- a/src/definitions/modules/nag.js
+++ b/src/definitions/modules/nag.js
@@ -146,8 +146,10 @@
                         module.debug('Dismissing nag', settings.storageMethod, settings.key, settings.value, settings.expires);
                         module.storage.set(settings.key, settings.value);
                     }
-                    event.stopImmediatePropagation();
-                    event.preventDefault();
+                    if (event) {
+                        event.stopImmediatePropagation();
+                        event.preventDefault();
+                    }
                 },
 
                 should: {