diff --git a/relnotes/next b/relnotes/next
--- a/relnotes/next
+++ b/relnotes/next
@@ -28,3 +28,7 @@
 
 == Internal API Changes ==
 
+ * `mercurial.bookmarks.bmstore` no longer has a convenience method
+   for looking up changectx instances from a bookmark name. Use
+   `repo[repo.bookmarks[name]]` intead of
+   `repo.bookmarks.changectx(name)`.