diff --git a/contrib/pg_upgrade/dump.c b/contrib/pg_upgrade/dump.c
index 148dfb70c1805c0aa6ff3a961623bacbcf5273d4..38169e6f90a77fa0051a749fcadc1651a11f020a 100644
--- a/contrib/pg_upgrade/dump.c
+++ b/contrib/pg_upgrade/dump.c
@@ -24,7 +24,8 @@ generate_old_dump(void)
 	 * restores the frozenid's for databases and relations.
 	 */
 	exec_prog(UTILITY_LOG_FILE, NULL, true,
-			  "\"%s/pg_dumpall\" %s --schema-only --binary-upgrade %s -f %s",
+			  "\"%s/pg_dumpall\" %s --schema-only --quote-all-identifiers "
+			  "--binary-upgrade %s -f %s",
 			  new_cluster.bindir, cluster_conn_opts(&old_cluster),
 			  log_opts.verbose ? "--verbose" : "",
 			  ALL_DUMP_FILE);