diff --git a/scripts/setup/terminate-psql-sessions b/scripts/setup/terminate-psql-sessions
index c48a2817a5..d243fccbe6 100755
--- a/scripts/setup/terminate-psql-sessions
+++ b/scripts/setup/terminate-psql-sessions
@@ -15,7 +15,7 @@ tables="$(printf "'%s'," "${@//\'/\'\'}")"
 tables="${tables%,}"
 
 if [ "$EUID" -eq 0 ]; then
-    sudo -u "$DEFAULT_USER" psql postgres "$DEFAULT_USER" <<EOF
+    su - "$DEFAULT_USER" -c "psql postgres '$DEFAULT_USER'" <<EOF
 SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname IN ($tables);
 EOF
 else