diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -675,11 +675,15 @@ class localrepository:
             ds = self.opener("dirstate").read()
         except IOError:
             ds = ""
-        self.opener("undo.dirstate", "w").write(ds)
+        self.opener("journal.dirstate", "w").write(ds)
 
-        return transaction.transaction(self.ui.warn,
-                                       self.opener, self.join("journal"),
-                                       self.join("undo"))
+        def after():
+            util.rename(self.join("journal"), self.join("undo"))
+            util.rename(self.join("journal.dirstate"),
+                        self.join("undo.dirstate"))
+
+        return transaction.transaction(self.ui.warn, self.opener,
+                                       self.join("journal"), after)
 
     def recover(self):
         lock = self.lock()
diff --git a/mercurial/transaction.py b/mercurial/transaction.py
--- a/mercurial/transaction.py
+++ b/mercurial/transaction.py
@@ -50,7 +50,7 @@ class transaction:
         self.file.close()
         self.entries = []
         if self.after:
-            util.rename(self.journal, self.after)
+            self.after()
         else:
             os.unlink(self.journal)
         self.journal = None
diff --git a/tests/test-hup.out b/tests/test-hup.out
--- a/tests/test-hup.out
+++ b/tests/test-hup.out
@@ -7,4 +7,4 @@ rollback completed
 00changelog.d
 00changelog.i
 data
-undo.dirstate
+journal.dirstate