diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c
index aac8e3d0ebe95c9db1ceab0b486de40007403aaf..f797f141bae8cb4d3269506dec99aff74dfd1592 100644
--- a/src/backend/storage/lmgr/proc.c
+++ b/src/backend/storage/lmgr/proc.c
@@ -38,6 +38,7 @@
 
 #include "access/transam.h"
 #include "access/xact.h"
+#include "catalog/namespace.h"
 #include "miscadmin.h"
 #include "postmaster/autovacuum.h"
 #include "replication/syncrep.h"