diff --git a/scripts/upgrade b/scripts/upgrade
index cf55fb2..85e1acc 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -27,6 +27,7 @@ language=$(ynh_app_setting_get --app=$app --key=language)
 db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 
 fpm_footprint=$(ynh_app_setting_get --app=$app --key=fpm_footprint)
+fpm_free_footprint=$(ynh_app_setting_get --app=$app --key=fpm_free_footprint)
 fpm_usage=$(ynh_app_setting_get --app=$app --key=fpm_usage)
 
 #=================================================