diff --git a/postgres/files/pgbackup.sh b/postgres/files/pgbackup.sh
index c1d851e5c13686a5086dbfd929cd1e65e36d6bfa..fcc746958a465e56d1a779799da4c5925c122832 100755
--- a/postgres/files/pgbackup.sh
+++ b/postgres/files/pgbackup.sh
@@ -5,5 +5,5 @@ do
 	sudo -u postgres pg_dump -o $DB | gzip -c -- > ${DB}.sql.gz
 done
 
-sudo -u postgres pg_dumpall -U postgres -o | gzip -c -- > pg_dumpall.sql.gz
+sudo -u postgres pg_dumpall -g -U postgres -o | gzip -c -- > pg_dumpall.sql.gz