diff --git a/mozilla/xpcom/ds/MANIFEST b/mozilla/xpcom/ds/MANIFEST
index c2f37702b2e..7742924950b 100644
--- a/mozilla/xpcom/ds/MANIFEST
+++ b/mozilla/xpcom/ds/MANIFEST
@@ -6,7 +6,6 @@ nsEnumeratorUtils.h
 nsHashtable.h
 nsHashtableEnumerator.h
 nsIArena.h
-nsIBuffer.h
 nsIByteBuffer.h
 nsIObserverList.h
 nsIProperties.h