diff --git a/scripts/upgrade b/scripts/upgrade
index 13f4723..6a59c02 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -303,7 +303,7 @@ then
 fi
 if [ -z "$auto_join_rooms" ]
 then
-  auto_join_rooms="#auto_join_room:""$server_name"
+  auto_join_rooms="\#auto_join_room:""$server_name"
   ynh_app_setting_set --app=$app --key=auto_join_rooms --value=$auto_join_rooms
 fi
 if [ -z "$autocreate_auto_join_rooms" ]