diff --git a/share/man/man9/BUS_CHILD_DETACHED.9 b/share/man/man9/BUS_CHILD_DETACHED.9
--- a/share/man/man9/BUS_CHILD_DETACHED.9
+++ b/share/man/man9/BUS_CHILD_DETACHED.9
@@ -39,7 +39,10 @@
 .Sh DESCRIPTION
 The
 .Fn BUS_CHILD_DETACHED
-method is invoked by the new-bus framework after a device is detached.
+method is invoked by the new-bus framework after a device is detached
+or if a driver's attach routine
+.Pq see Xr DEVICE_ATTACH 9
+fails.
 A bus driver can provide an implementation of this method to
 reclaim any resources allocated on behalf of the child or
 to cleanup state not properly released by a