diff --git a/data/helpers.d/postgresql b/data/helpers.d/postgresql
index d252ae2dc..a4cb50393 100644
--- a/data/helpers.d/postgresql
+++ b/data/helpers.d/postgresql
@@ -276,7 +276,7 @@ ynh_psql_test_if_first_run() {
 			local pg_hba=/etc/postgresql/9.6/main/pg_hba.conf
 			local logfile=/var/log/postgresql/postgresql-9.6-main.log
 		else
-			ynh_die "postgresql shoud be 9.4 or 9.6"
+			ynh_die "postgresql shoud be 9.4 or 9.6 or it could be a problem of locale see https://serverfault.com/questions/426989/postgresql-etc-postgresql-doesnt-exist"
 		fi
 
 		ynh_systemd_action --service_name=postgresql --action=start