diff --git a/mailnews/compose/src/nsSmtpService.cpp b/mailnews/compose/src/nsSmtpService.cpp
index 8e51b41a6e1f..19da2f07955b 100644
--- a/mailnews/compose/src/nsSmtpService.cpp
+++ b/mailnews/compose/src/nsSmtpService.cpp
@@ -577,7 +577,7 @@ nsSmtpService::CreateSmtpServer(nsISmtpServer **aResult)
     
     do {
         key = "smtp";
-        key.Append(i);
+        key.Append(i++);
         
         entry.key = key;
         entry.server = nsnull;