diff --git a/hgext3rd/obsshelve.py b/hgext3rd/obsshelve.py
--- a/hgext3rd/obsshelve.py
+++ b/hgext3rd/obsshelve.py
@@ -311,9 +311,9 @@
     '''Abort current transaction for shelve/unshelve, but keep dirstate
     '''
     tr = repo.currenttransaction()
-    repo.dirstate.savebackup(tr, suffix='.shelve')
+    repo.dirstate.savebackup(tr, 'dirstate.shelve')
     tr.abort()
-    repo.dirstate.restorebackup(None, suffix='.shelve')
+    repo.dirstate.restorebackup(None, 'dirstate.shelve')
 
 def createcmd(ui, repo, pats, opts):
     """subcommand that creates a new shelve"""