diff --git a/scripts/backup b/scripts/backup
index 82091d2..42c7b13 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -19,6 +19,9 @@ set -e
 # db names, ...
 app=$YNH_APP_INSTANCE_NAME
 
+# Source YunoHost helpers
+source /usr/share/yunohost/helpers
+
 # Retrieve arguments
 domain=$(sudo yunohost app setting $app domain)