diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
index 3d26e22..ef7cd94 100644
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -1119,7 +1119,7 @@ update_tablespace_symlink(Oid oid, const char *old_dir)
 
 	if (strcmp(old_dir, new_dir) != 0)
 	{
-		char	   *linkloc = psprintf("%s/pg_tblspc/%d", basedir, oid);
+		char	   *linkloc = psprintf("%s/pg_tblspc/%u", basedir, oid);
 
 		if (unlink(linkloc) != 0 && errno != ENOENT)
 		{