diff --git a/mod/chat/gui_header_js/jsupdate.php b/mod/chat/gui_header_js/jsupdate.php
index 0d5ff638de0..f33af4a83db 100644
--- a/mod/chat/gui_header_js/jsupdate.php
+++ b/mod/chat/gui_header_js/jsupdate.php
@@ -116,14 +116,6 @@ ob_start();
         <meta http-equiv="content-type" content="text/html; charset=utf-8" />
         <script type="text/javascript">
         //<![CDATA[
-        function safari_refresh() {
-            self.location.href= '<?php echo $refreshurl;?>';
-        }
-        var issafari = false;
-        if (window.devicePixelRatio) {
-            issafari = true;
-            setTimeout('safari_refresh()', <?php echo $CFG->chat_refresh_room * 1000;?>);
-        }
         if (parent.msg && parent.msg.document.getElementById("msgStarted") == null) {
             parent.msg.document.close();
             parent.msg.document.open("text/html","replace");
diff --git a/mod/chat/gui_header_js/jsupdated.php b/mod/chat/gui_header_js/jsupdated.php
index 1ff6d763061..3af2347a9e2 100644
--- a/mod/chat/gui_header_js/jsupdated.php
+++ b/mod/chat/gui_header_js/jsupdated.php
@@ -106,14 +106,6 @@ $refreshurl = "{$CFG->wwwroot}/mod/chat/gui_header_js/jsupdated.php?".
         <meta http-equiv="content-type" content="text/html; charset=utf-8" />
         <script type="text/javascript">
         //<![CDATA[
-        function safari_refresh() {
-            self.location.href= '<?php echo $refreshurl;?>';
-        }
-        var issafari = false;
-        if(window.devicePixelRatio){
-            issafari = true;
-            setTimeout('safari_refresh()', <?php echo $CFG->chat_refresh_room * 1000;?>);
-        }
         if (parent.msg.document.getElementById("msgStarted") == null) {
             parent.msg.document.close();
             parent.msg.document.open("text/html","replace");