diff --git a/scripts/upgrade b/scripts/upgrade
index f2bec17..f787e44 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -29,6 +29,11 @@ if [ -z $final_path ]; then	# If final_path doesn't exist, create it
 	ynh_app_setting_set $app final_path $final_path
 fi
 
+if [ -z $db_name ]; then	# If db_name doesn't exist, create it
+	db_name=$(ynh_sanitize_dbid $app)
+	ynh_app_setting_set $app db_name $db_name
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================