diff --git a/mailnews/base/public/MANIFEST b/mailnews/base/public/MANIFEST
index 18795be7941a..ac2a326daeaf 100644
--- a/mailnews/base/public/MANIFEST
+++ b/mailnews/base/public/MANIFEST
@@ -17,7 +17,6 @@
 #
 
 nsIMessenger.h
-nsIMsgRFC822Parser.h
 msgCore.h
 nsMsgFolderFlags.h
 nsMsgLocalFolderHdrs.h
diff --git a/mailnews/base/src/MANIFEST b/mailnews/base/src/MANIFEST
index 8fb33ca3e1f2..4f0fa918c867 100644
--- a/mailnews/base/src/MANIFEST
+++ b/mailnews/base/src/MANIFEST
@@ -17,7 +17,6 @@
 #
 
 nsMessenger.h
-nsMsgRFC822Parser.h
 nsMsgKeyArray.h
 nsUrlListenerManager.h
 nsMsgMailSession.h
diff --git a/mailnews/mime/public/MANIFEST b/mailnews/mime/public/MANIFEST
index 0f212864f48c..f08a22e9072d 100644
--- a/mailnews/mime/public/MANIFEST
+++ b/mailnews/mime/public/MANIFEST
@@ -21,3 +21,4 @@ nsIMimeObjectClassAccess.h
 nsIMimeConverter.h
 nsIMimeEmitter.h
 nsMailHeaders.h
+nsIMsgHeaderParser.h