diff --git a/hgext/rebase.py b/hgext/rebase.py
index 160efd225b24983f01b4fb7eb5f2dc9b58f04856_aGdleHQvcmViYXNlLnB5..5f4934487382d439d1d69041f13080562cbb3e20_aGdleHQvcmViYXNlLnB5 100644
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -50,5 +50,5 @@
 
 @command('rebase',
     [('s', 'source', '',
-     _('rebase from the specified changeset'), _('REV')),
+     _('rebase the specified changeset and descendants'), _('REV')),
     ('b', 'base', '',
@@ -54,6 +54,5 @@
     ('b', 'base', '',
-     _('rebase the tree around the specified changeset without '
-       'ancestors of dest'),
+     _('rebase everything from branching point of specified changeset'),
      _('REV')),
     ('r', 'rev', [],
      _('rebase these revisions'),