diff --git a/scripts/install b/scripts/install
index 426372a..df240cb 100755
--- a/scripts/install
+++ b/scripts/install
@@ -45,7 +45,7 @@ fi
 
 server_name=$(ynh_app_setting_get --app $synapse_instance --key server_name)
 domain=$(ynh_app_setting_get --app $synapse_instance --key domain)
-user_domain=$(ynh_app_setting_get --app=$app --key=user_domain)
+user_domain=$(ynh_app_setting_get --app=$synapse_instance --key=server_name)
 app_service_registration_path="/etc/matrix-$synapse_instance/app-service"
 log_path="/var/log/$app"
 base_config_path="$final_path/base.config.yaml"