diff --git a/mozilla/toolkit/skin/win/tree.css b/mozilla/toolkit/skin/win/tree.css
index 4e2ec202750..4298a649499 100644
--- a/mozilla/toolkit/skin/win/tree.css
+++ b/mozilla/toolkit/skin/win/tree.css
@@ -36,8 +36,8 @@ tree {
   -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
   -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
   -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-  background-color: Window;
-  color: WindowText;
+  background-color: -moz-Field;
+  color: -moz-FieldText;
   -moz-appearance: listbox;
 }