diff --git a/mercurial/archival.py b/mercurial/archival.py
--- a/mercurial/archival.py
+++ b/mercurial/archival.py
@@ -75,7 +75,8 @@ def buildmetadata(ctx):
         cmdutil.show_changeset(repo.ui, repo, opts).show(ctx)
         ltags, dist = repo.ui.popbuffer().split('\n')
         ltags = ltags.split(':')
-        changessince = len(repo.revs('only(.,%s)', ltags[0]))
+        # XXX: ctx.rev() needs to be handled differently with wdir()
+        changessince = len(repo.revs('only(%d,%s)', ctx.rev(), ltags[0]))
         tags = ''.join('latesttag: %s\n' % t for t in ltags)
         tags += 'latesttagdistance: %s\n' % dist
         tags += 'changessincelatesttag: %s\n' % changessince
diff --git a/tests/test-glog.t b/tests/test-glog.t
--- a/tests/test-glog.t
+++ b/tests/test-glog.t
@@ -2013,6 +2013,16 @@ Test --follow and forward --rev
   |
   o  0 add a
   
+  $ hg archive -r 7 archive
+  $ grep changessincelatesttag archive/.hg_archival.txt
+  changessincelatesttag: 1
+  $ rm -r archive
+
+changessincelatesttag with no prior tag
+  $ hg archive -r 4 archive
+  $ grep changessincelatesttag archive/.hg_archival.txt
+  changessincelatesttag: 5
+
   $ hg export 'all()'
   # HG changeset patch
   # User test