diff --git a/mozilla/mailnews/imap/src/nsImapIncomingServer.cpp b/mozilla/mailnews/imap/src/nsImapIncomingServer.cpp
index cc9cb3e79d8..2141b499c41 100644
--- a/mozilla/mailnews/imap/src/nsImapIncomingServer.cpp
+++ b/mozilla/mailnews/imap/src/nsImapIncomingServer.cpp
@@ -1050,7 +1050,7 @@ nsresult nsImapIncomingServer::GetPFCForStringId(PRBool createIfMissing, PRInt32
   nsCAutoString pfcMailUri(pfcURI);
 //  pfcMailUri.Append(".sbd");
   pfcMailUri.Append("/");
-  pfcMailUri.AppendWithConversion(pfcName.get());
+  pfcMailUri.Append(NS_ConvertUCS2toUTF8(pfcName).get());
   pfcParent->GetChildWithURI(pfcMailUri.get(), PR_FALSE, PR_FALSE /* caseInsensitive*/, aFolder);
   if (!*aFolder && createIfMissing)
   {