diff --git a/nsprpub/lib/ds/MANIFEST b/nsprpub/lib/ds/MANIFEST
index ceda33b7bf8b..ce8226bdd8b0 100644
--- a/nsprpub/lib/ds/MANIFEST
+++ b/nsprpub/lib/ds/MANIFEST
@@ -4,4 +4,5 @@
 
 plarenas.h
 plarena.h
+plevent.h
 plhash.h