diff --git a/scripts/upgrade b/scripts/upgrade
index a691cf6..43d78e6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -156,8 +156,8 @@ ynh_add_nginx_config
 #=================================================
 ynh_script_progression --message="Upgrading systemd configuration..." --weight=1
 
-if [ ! -d directory ]; then
-	mkdir /var/log/13ft
+if [ ! -d /var/log/$app ]; then
+	mkdir /var/log/$app
 fi
 
 # Create a dedicated systemd config