# Problem with action\_default\_fallback

**URL:** <https://forum.rasa.com/t/problem-with-action-default-fallback/43233>\
**Category:** Rasa Open Source\
**Created:** [May 5, 2021, 11:58am UTC](https://forum.rasa.com/t/problem-with-action-default-fallback/43233 "2021-05-05T11:58:15Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![desmarchris](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/desmarchris/32/12277_2.png) [@desmarchris](https://forum.rasa.com/u/desmarchris)\
**Post date:** [May 6, 2021, 3:06pm UTC](https://forum.rasa.com/t/problem-with-action-default-fallback/43233/4 "2021-05-06T15:06:21Z")

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Thanks!

So this is happening because you’re not returning anything from this action. The default `action_default_fallback` returns: `UserUtteranceReverted()`

But since you aren’t doing anything custom with this, I would remove this custom action and use the default behavior. As long as you have your response defined under `utter_default` it should work as expected.

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_[View the full topic](https://forum.rasa.com/t/problem-with-action-default-fallback/43233)._