diff --git a/plugins/kolab_files/skins/larry/ui.js b/plugins/kolab_files/skins/larry/ui.js
index 760aaf34..a5e359bd 100644
--- a/plugins/kolab_files/skins/larry/ui.js
+++ b/plugins/kolab_files/skins/larry/ui.js
@@ -103,7 +103,7 @@ function kolab_files_upload_input(button)
   file.attr({name: 'file[]', type: 'file', multiple: 'multiple', size: 5})
     .change(function() { rcmail.files_upload('#filesuploadform'); })
     // opacity:0 does the trick, display/visibility doesn't work
-    .css({opacity: 0, cursor: 'pointer', position: 'absolute', top: '10000px', left: '10000px'});
+    .css({opacity: 0, cursor: 'pointer', outline: 'none', position: 'absolute', top: '10000px', left: '10000px'});
 
   // In FF and IE we need to move the browser file-input's button under the cursor
   // Thanks to the size attribute above we know the length of the input field