diff --git a/themes/admin_default/css/fix-ie.css b/themes/admin_default/css/fix-ie.css
index 71b399a3..0745b035 100644
--- a/themes/admin_default/css/fix-ie.css
+++ b/themes/admin_default/css/fix-ie.css
@@ -4,3 +4,12 @@
 #gHeader {
   zoom: 1;
 }
+
+.gUnavailable {
+  filter: alpha(opacity=40);
+}
+
+.gUnavailable:hover {
+  filter: alpha(opacity=100);
+}
+