diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index 62b65b03701..913573a038f 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -1,4 +1,4 @@
-@charset "utf-8";
+@charset "UTF-8";
 @font-face {
   font-family: "mnmliconsRegular";
   src: url("/web/static/src/font/mnmliconsv21-webfont.eot") format("eot");
@@ -8,6 +8,7 @@
   font-weight: normal;
   font-style: normal;
 }
+
 @font-face {
   font-family: "EntypoRegular";
   src: url("/web/static/src/font/entypo-webfont.eot") format("eot");
@@ -2996,6 +2997,7 @@
     top: 0px;
   }
 }
+
 .kitten-mode-activated {
   background-size: cover;
   background-attachment: fixed;
@@ -3384,3 +3386,9 @@ div.tour-backdrop {
 body {
   overflow: auto;
 }
+
+@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
+  .oe_secondary_menus_container {
+    position: static !important;
+  }
+}
diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index abe22a60563..2977c77ea9c 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -2763,5 +2763,13 @@ div.tour-backdrop
 
 body
     overflow: auto
+
+// hack to make IE11 work
+@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) 
+    .oe_secondary_menus_container 
+        position: static !important
+
+
+
 // au BufWritePost,FileWritePost *.sass :!sass --style expanded --line-numbers <afile> > "%:p:r.css"
 // vim:tabstop=4:shiftwidth=4:softtabstop=4:fdm=marker: