diff --git a/wp-login.php b/wp-login.php
index c9756a3aef..5ed01661c1 100644
--- a/wp-login.php
+++ b/wp-login.php
@@ -116,6 +116,7 @@ function login_header($title = 'Log In', $message = '', $wp_error = '') {
 	}
 } // End of login_header()
 function wp_shake_js() {
+	if ( !$is_iphone ) :
 ?>
 <script type="text/javascript">
 addLoadEvent = function(func){if(typeof jQuery!="undefined")jQuery(document).ready(func);else if(typeof wpOnload!='function'){wpOnload=func;}else{var oldonload=wpOnload;wpOnload=function(){oldonload();func();}}};
@@ -125,6 +126,7 @@ function shake(id,a,d){c=a.shift();s(id,c);if(a.length>0){setTimeout(function(){
 addLoadEvent(function(){ var p=new Array(15,30,15,0,-15,-30,-15,0);p=p.concat(p.concat(p));var i=document.forms[0].id;g(i).position='relative';shake(i,p,20);});
 </script>
 <?php
+	endif;
 }
 
 /**