diff --git a/mozilla/suite/locales/en-US/chrome/mailnews/messenger.dtd b/mozilla/suite/locales/en-US/chrome/mailnews/messenger.dtd
index 635385e2cea..546e4868cd5 100644
--- a/mozilla/suite/locales/en-US/chrome/mailnews/messenger.dtd
+++ b/mozilla/suite/locales/en-US/chrome/mailnews/messenger.dtd
@@ -187,7 +187,7 @@ Rights Reserved.
 <!ENTITY expandAllThreadsCmd.key "*">
 <!ENTITY collapseAllThreadsCmd.label "Collapse All Threads">
 <!ENTITY collapseAllThreadsCmd.accesskey "C">
-<!ENTITY collapseAllThreadsCmd.key "/">
+<!ENTITY collapseAllThreadsCmd.key "\">
 <!ENTITY unreadMsgsCmd.label "Unread">
 <!ENTITY unreadMsgsCmd.accesskey "U">
 <!ENTITY threadsWithUnreadCmd.label "Threads With Unread">