diff --git a/release-content/migration-guides/components-registrator-derefmut.md b/release-content/migration-guides/components-registrator-derefmut.md
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+---
+title: ComponentsRegistrator no longer implements DerefMut
+pull_requests: [14791, 15458, 15269]
+---
+
+`ComponentsRegistrator` no longer implements `DerefMut<Target = Components>`, meaning you won't be able to get a `&mut Components` from it. The only two methods on `Components` that took `&mut self` (`any_queued_mut` and `num_queued_mut`) have been reimplemented on `ComponentsRegistrator`, meaning you won't need to migrate them. Other usages of `&mut Components` were unsupported.