diff --git a/themes/pmahomme/css/theme_right.css.php b/themes/pmahomme/css/theme_right.css.php
index b32fb7f7b..605296f96 100644
--- a/themes/pmahomme/css/theme_right.css.php
+++ b/themes/pmahomme/css/theme_right.css.php
@@ -286,6 +286,15 @@ select{
     background:url(./themes/pmahomme/img/input_bg.gif)
 }
 
+select[multiple] {
+    background: #fff;
+    background: -webkit-gradient(linear, center top, center bottom, from(#fff), color-stop(0.8, #f1f1f1), to(#fbfbfb));
+    background: -webkit-linear-gradient(#fff, #f1f1f1 80%, #fbfbfb);
+    background: -moz-linear-gradient(#fff, #f1f1f1 80%, #fbfbfb);
+    /* none for Opera 11.10 as <option>s always have solid white background */
+    filter:  progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#f2f2f2');
+}
+
 /******************************************************************************/
 /* classes */
 div.tools {