diff --git a/docs/migration.md b/docs/migration.md
index 0d1fd52116..5d14f34a7b 100644
--- a/docs/migration.md
+++ b/docs/migration.md
@@ -102,6 +102,10 @@ New to Bootstrap 4 is the Reboot, a new stylesheet that builds on Normalize with
 - Dropped nearly all `>` selectors for simpler styling via un-nested classes.
 - Instead of HTML-specific selectors like `.nav > li > a`, we use separate classes for `.nav`s, `.nav-item`s, and `.nav-link`s. This makes your HTML more flexible while bringing along increased extensibility.
 
+## Navbar
+
+- Dropped the `.navbar-form` class entirely. It's no longer necessary.
+
 ### Pager
 
 - Renamed `.previous` and `.next` to `.pager-prev` and `.pager-next`.