diff --git a/addons/web/static/lib/spinjs/spin.js b/addons/web/static/lib/spinjs/spin.js
index d8e21786a1f..e848c55c55f 100644
--- a/addons/web/static/lib/spinjs/spin.js
+++ b/addons/web/static/lib/spinjs/spin.js
@@ -39,6 +39,7 @@
    */
   var sheet = function() {
     var el = createEl('style');
+    var el = createEl('style', {type : 'text/css'});
     ins(document.getElementsByTagName('head')[0], el);
     return el.sheet || el.styleSheet;
   }();