diff --git a/hgext/shelve.py b/hgext/shelve.py
--- a/hgext/shelve.py
+++ b/hgext/shelve.py
@@ -572,7 +572,7 @@ def unshelvecontinue(ui, repo, state, op
            _('abort an incomplete unshelve operation')),
           ('c', 'continue', None,
            _('continue an incomplete unshelve operation')),
-          ('', 'keep', None,
+          ('k', 'keep', None,
            _('keep shelve after unshelving')),
           ('', 'date', '',
            _('set date for temporary commits (DEPRECATED)'), _('DATE'))],
diff --git a/tests/test-shelve.t b/tests/test-shelve.t
--- a/tests/test-shelve.t
+++ b/tests/test-shelve.t
@@ -493,7 +493,7 @@ test keep and cleanup
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg shelve --list
   default         (*)    changes to 'create conflict' (glob)
-  $ hg unshelve --keep
+  $ hg unshelve -k
   unshelving change 'default'
   $ hg shelve --list
   default         (*)    changes to 'create conflict' (glob)