diff --git a/scripts/backup b/scripts/backup
index 6401df9..6a6c158 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -3,6 +3,8 @@
 # Exit on command errors and treat unset variables as an error
 set -eu
 
+# Récupère les infos de l'application.
+app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get "$app" domain)