diff --git a/mercurial/bookmarks.py b/mercurial/bookmarks.py
--- a/mercurial/bookmarks.py
+++ b/mercurial/bookmarks.py
@@ -853,6 +853,8 @@
             return
         tgt = cur
         if rev:
+            warnm = "adding bookmarks to a hidden changeset"
+            repo = scmutil.unhidehashlikerevs(repo, [rev], 'warn', warnm)
             tgt = scmutil.revsingle(repo, rev).node()
         for bm in marks.checkconflict(mark, force, tgt):
             changes.append((bm, None))
diff --git a/tests/test-directaccess.t b/tests/test-directaccess.t
--- a/tests/test-directaccess.t
+++ b/tests/test-directaccess.t
@@ -186,3 +186,11 @@
   abort: hidden revision '2'!
   (use --hidden to access hidden revisions)
   [255]
+
+Setting a bookmark will make that changeset unhidden, so this should come in end
+
+  $ hg bookmarks -r 28ad74 book
+  adding bookmarks to a hidden changeset 28ad74487de9
+
+  $ hg bookmarks
+     book                      2:28ad74487de9