diff --git a/src/bin/pg_upgrade/pg_upgrade.h b/src/bin/pg_upgrade/pg_upgrade.h
index 10182de949fd7733bc0f1bd6b6fbedeae80dffe1..20f9a91087f41f9f20d1b92584f995839509676a 100644
--- a/src/bin/pg_upgrade/pg_upgrade.h
+++ b/src/bin/pg_upgrade/pg_upgrade.h
@@ -396,7 +396,6 @@ void		get_sock_dir(ClusterInfo *cluster, bool live_check);
 
 /* relfilenode.c */
 
-void		get_pg_database_relfilenode(ClusterInfo *cluster);
 void transfer_all_new_tablespaces(DbInfoArr *old_db_arr,
 				  DbInfoArr *new_db_arr, char *old_pgdata, char *new_pgdata);
 void transfer_all_new_dbs(DbInfoArr *old_db_arr,