diff --git a/mailnews/mapi/mapihook/src/nsMapiRegistryUtils.cpp b/mailnews/mapi/mapihook/src/nsMapiRegistryUtils.cpp
index 502540611950..2dddb433875e 100644
--- a/mailnews/mapi/mapihook/src/nsMapiRegistryUtils.cpp
+++ b/mailnews/mapi/mapihook/src/nsMapiRegistryUtils.cpp
@@ -491,10 +491,10 @@ nsresult nsMapiRegistryUtils::setDefaultMailClient()
         nsXPIDLString defaultMailTitle;
         // Use vendorName instead of brandname since brandName is product name
         // and has more than just the name of the application
-        const PRUnichar *keyValuePrefixStr[] = { vendorName(), versionNo() };
+        const PRUnichar *keyValuePrefixStr[] = { vendorName() };
         NS_NAMED_LITERAL_STRING(defaultMailTitleTag, "defaultMailDisplayTitle");
         rv = bundle->FormatStringFromName(defaultMailTitleTag.get(),
-                                      keyValuePrefixStr, 2,
+                                      keyValuePrefixStr, 1,
                                       getter_Copies(defaultMailTitle));
         if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
 
diff --git a/mailnews/mapi/resources/locale/en-US/mapi.properties b/mailnews/mapi/resources/locale/en-US/mapi.properties
index 8ece7a332005..d820a5981e2c 100644
--- a/mailnews/mapi/resources/locale/en-US/mapi.properties
+++ b/mailnews/mapi/resources/locale/en-US/mapi.properties
@@ -18,6 +18,6 @@ mapiBlindSendWarning=Another application is attempting to send mail using your u
 mapiBlindSendDontShowAgain=Warn me whenever other applications try to send mail from me
 
 #Default Mail Display String
-# localization note, $1%S is the app name, $2%S is the version 
-defaultMailDisplayTitle=%S %S Mail
+# localization note, %S is the vendor name
+defaultMailDisplayTitle=%S Mail
 
diff --git a/xpinstall/packager/windows/mail.jst b/xpinstall/packager/windows/mail.jst
index 5d24a5905062..5d7d227d67b5 100644
--- a/xpinstall/packager/windows/mail.jst
+++ b/xpinstall/packager/windows/mail.jst
@@ -264,7 +264,7 @@ function updateMapi()
   var winsysMapi32File;
   var mapiProxyFile;
   var subkey;
-  var mailDefaultDescription = "$ProductName$ $UserAgentShort$ Mail";
+  var mailDefaultDescription = "$ProductName$ Mail";
 
   winreg = getWinRegistry();
   if(winreg != null)