diff --git a/config/initializers/doorkeeper.rb b/config/initializers/doorkeeper.rb
index 36898e7f4a7..4d471507013 100644
--- a/config/initializers/doorkeeper.rb
+++ b/config/initializers/doorkeeper.rb
@@ -2,6 +2,9 @@
 
 Doorkeeper.configure do
 orm :active_record
+  resource_owner_authenticator do
+    current_user || redirect_to(login_path)
+  end
 
   admin_authenticator do
     if current_user