diff --git a/mozilla/themes/classic/messenger/filterDialog.css b/mozilla/themes/classic/messenger/filterDialog.css
index 8a9af6aa809..17911c15672 100644
--- a/mozilla/themes/classic/messenger/filterDialog.css
+++ b/mozilla/themes/classic/messenger/filterDialog.css
@@ -32,10 +32,10 @@
 /* ::::: columns :::::: */
 
 
-treechildren:-moz-tree-cell(activeColumn) {
+treechildren:-moz-tree-image(activeColumn) {
   list-style-image: url("chrome://messenger/skin/icons/dot.gif");
 }
 
-treechildren:-moz-tree-cell(activeColumn, Enabled-true) {
+treechildren:-moz-tree-image(activeColumn, Enabled-true) {
  list-style-image: url("chrome://messenger/skin/icons/check.gif");
 }