diff --git a/mailnews/ui/messenger/resources/accounttree.xul b/mailnews/ui/messenger/resources/accounttree.xul
index 61c1aac2d902..514fdf732f80 100644
--- a/mailnews/ui/messenger/resources/accounttree.xul
+++ b/mailnews/ui/messenger/resources/accounttree.xul
@@ -1,5 +1,6 @@
 <?xml version="1.0"?>
-<?xml-stylesheet href="am.css" type="text/css"?>
+<?xml-stylesheet href="resource:/res/samples/xul.css" type="text/css"?>
+<?xml-stylesheet href="chrome://messenger/skin/" type="text/css"?>
 
 <!DOCTYPE window>
 
diff --git a/mailnews/ui/messenger/resources/mailshell.xul b/mailnews/ui/messenger/resources/mailshell.xul
index 269ff2dd8955..1ee67e5d3dfc 100644
--- a/mailnews/ui/messenger/resources/mailshell.xul
+++ b/mailnews/ui/messenger/resources/mailshell.xul
@@ -1,4 +1,5 @@
 <?xml version="1.0"?> 
+<?xml-stylesheet href="resource:/res/samples/xul.css" type="text/css"?>
 <?xml-stylesheet href="chrome://messenger/skin/" type="text/css"?> 
 
 <!DOCTYPE window