diff --git a/lib/persona.js b/lib/persona.js
index 4fb4c12..be3fdff 100644
--- a/lib/persona.js
+++ b/lib/persona.js
@@ -159,6 +159,10 @@ $(document).ready(function() {
 	}
 
 	function setupMobileMenu() {
+		if (!window.addEventListener) {
+			return;
+		}
+
 		var slideout = new Slideout({
 			'panel': document.getElementById('panel'),
 			'menu': document.getElementById('menu'),