diff --git a/app/controllers/devise_controller.rb b/app/controllers/devise_controller.rb
index bfc34579..1cd454f1 100644
--- a/app/controllers/devise_controller.rb
+++ b/app/controllers/devise_controller.rb
@@ -112,7 +112,7 @@ MESSAGE
     end
 
     if authenticated && resource = warden.user(resource_name)
-      flash[:alert] = I18n.t("devise.failure.already_authenticated")
+      set_flash_message(:alert, "already_authenticated", scope: "devise.failure")
       redirect_to after_sign_in_path_for(resource)
     end
   end