diff --git a/xpcom/ds/MANIFEST b/xpcom/ds/MANIFEST
index 9012b32365c3..36c34ad96017 100644
--- a/xpcom/ds/MANIFEST
+++ b/xpcom/ds/MANIFEST
@@ -9,6 +9,7 @@ nsHashtableEnumerator.h
 nsIArena.h
 nsIByteBuffer.h
 nsIObserverList.h
+nsIPersistentProperties.h
 nsISimpleEnumerator.h
 nsISizeOfHandler.h
 nsIUnicharBuffer.h