diff --git a/static/script/index.js b/static/script/index.js
index 6b78c2a..40b757f 100644
--- a/static/script/index.js
+++ b/static/script/index.js
@@ -1,5 +1,5 @@
 
-if(!navigator.userAgent.includes('Mobi')){
+if(window.outerWidth>640){
     $('.mod-panel h1').headroom({
         autoHide:false
     });