diff --git a/src/bin/pg_upgrade/check.c b/src/bin/pg_upgrade/check.c
index 2b3e359701c..07a26939bd1 100644
--- a/src/bin/pg_upgrade/check.c
+++ b/src/bin/pg_upgrade/check.c
@@ -539,11 +539,12 @@ create_script_for_cluster_analyze(char **analyze_script_file_name)
 static void
 check_for_new_tablespace_dir(ClusterInfo *new_cluster)
 {
+	int		tblnum;
 	char	new_tablespace_dir[MAXPGPATH];
 
 	prep_status("Checking for new cluster tablespace directories");
 
-	for (int tblnum = 0; tblnum < os_info.num_old_tablespaces; tblnum++)
+	for (tblnum = 0; tblnum < os_info.num_old_tablespaces; tblnum++)
 	{
 		struct stat statbuf;