diff --git a/xpfc/msg/public/nsISMTPService.h b/xpfc/msg/public/nsISMTPService.h
index 45941fa634b6..d0bbe2556507 100644
--- a/xpfc/msg/public/nsISMTPService.h
+++ b/xpfc/msg/public/nsISMTPService.h
@@ -22,7 +22,7 @@
 #include "nsISupports.h"
 #include "nsString.h"
 #include "nsIMessage.h"
-#include "nsIMIMEMessage.h"
+#include "nsIMimeMessage.h"
 #include "nsISMTPObserver.h"
 
 //b64f8b50-6f77-11d2-8dbc-00805f8a7ab6
diff --git a/xpfc/msg/src/nsSMTPService.cpp b/xpfc/msg/src/nsSMTPService.cpp
index 36442f4e1214..101770ed79ca 100644
--- a/xpfc/msg/src/nsSMTPService.cpp
+++ b/xpfc/msg/src/nsSMTPService.cpp
@@ -25,7 +25,7 @@
 #include <stdio.h>
 #include "nsCRT.h"
 #include "nsSMTPServerCallback.h"
-#include "nsIMIMEMessage.h"
+#include "nsIMimeMessage.h"
 
 static NS_DEFINE_IID(kISupportsIID,     NS_ISUPPORTS_IID);
 static NS_DEFINE_IID(kSMTPServiceIID,   NS_ISMTP_SERVICE_IID);