diff --git a/addons/web/static/src/js/core.js b/addons/web/static/src/js/core.js
index 50a12d20f56..8dfbd68e6de 100644
--- a/addons/web/static/src/js/core.js
+++ b/addons/web/static/src/js/core.js
@@ -600,7 +600,8 @@ openerp.web.Session = openerp.web.CallbackEnabled.extend( /** @lends openerp.web
                 tag.onload_done = true;
                 self.do_load_js(files);
             };
-            document.head.appendChild(tag);
+            var head = document.head || document.getElementsByTagName('head')[0];
+            head.appendChild(tag);
         } else {
             this.on_modules_loaded();
         }