diff --git a/xpcom/ds/MANIFEST b/xpcom/ds/MANIFEST
index 93135edd3a7e..c2ef04852a9d 100644
--- a/xpcom/ds/MANIFEST
+++ b/xpcom/ds/MANIFEST
@@ -9,7 +9,6 @@ nsHashtable.h
 nsHashtableEnumerator.h
 nsIArena.h
 nsIByteBuffer.h
-nsISimpleEnumerator.h
 nsISizeOfHandler.h
 nsIUnicharBuffer.h
 nsInt64.h
diff --git a/xpcom/ds/Makefile.in b/xpcom/ds/Makefile.in
index 1a224b78ab88..4cc9d5fb0c5d 100644
--- a/xpcom/ds/Makefile.in
+++ b/xpcom/ds/Makefile.in
@@ -83,7 +83,6 @@ EXPORTS		= \
 		nsHashtableEnumerator.h \
 		nsIArena.h \
 		nsIByteBuffer.h \
-		nsISimpleEnumerator.h \
 		nsISizeOfHandler.h \
 		nsIUnicharBuffer.h \
 		nsInt64.h \