diff --git a/xpcom/ds/MANIFEST b/xpcom/ds/MANIFEST
index 8a94bb5b2e51..9859c0d59ab5 100644
--- a/xpcom/ds/MANIFEST
+++ b/xpcom/ds/MANIFEST
@@ -34,6 +34,7 @@ nsVector.h
 nsVoidArray.h
 nsVoidBTree.h
 nsXPIDLString.h
+pldhash.h
 plvector.h
 nsTextFormater.h
 nsTextFormatter.h