diff --git a/hgext/narrow/narrowwirepeer.py b/hgext/narrow/narrowwirepeer.py
--- a/hgext/narrow/narrowwirepeer.py
+++ b/hgext/narrow/narrowwirepeer.py
@@ -93,7 +93,7 @@
                                     exclude=oldexcludes)
         diffmatch = matchmod.differencematcher(newmatch, oldmatch)
 
-        bundler = bundle2.widen_bundle(repo, diffmatch, common, known,
+        bundler = bundle2.widen_bundle(repo, diffmatch, oldmatch, common, known,
                                              cgversion, ellipses)
     except error.Abort as exc:
         bundler = bundle2.bundle20(repo.ui)
diff --git a/mercurial/bundle2.py b/mercurial/bundle2.py
--- a/mercurial/bundle2.py
+++ b/mercurial/bundle2.py
@@ -2267,7 +2267,8 @@
     streamclone.applybundlev2(repo, part, filecount, bytecount,
                               requirements)
 
-def widen_bundle(repo, diffmatcher, common, known, cgversion, ellipses):
+def widen_bundle(repo, oldmatcher, newmatcher, common, known, cgversion,
+                 ellipses):
     """generates bundle2 for widening a narrow clone
 
     repo is the localrepository instance
@@ -2289,7 +2290,8 @@
         # XXX: we should only send the filelogs (and treemanifest). user
         # already has the changelog and manifest
         packer = changegroup.getbundler(cgversion, repo,
-                                        filematcher=diffmatcher,
+                                        filematcher=newmatcher,
+                                        oldfilematcher=oldmatcher,
                                         fullnodes=commonnodes)
         cgdata = packer.generate(set([nodemod.nullid]), list(commonnodes),
                                  False, 'narrow_widen', changelog=False)
diff --git a/mercurial/changegroup.py b/mercurial/changegroup.py
--- a/mercurial/changegroup.py
+++ b/mercurial/changegroup.py
@@ -727,7 +727,7 @@
         progress.complete()
 
 class cgpacker(object):
-    def __init__(self, repo, filematcher, version,
+    def __init__(self, repo, filematcher, oldfilematcher, version,
                  builddeltaheader, manifestsend,
                  forcedeltaparentprev=False,
                  bundlecaps=None, ellipses=False,
@@ -762,7 +762,9 @@
         significantly smaller.
         """
         assert filematcher
+        assert oldfilematcher
         self._filematcher = filematcher
+        self._oldfilematcher = oldfilematcher
 
         self.version = version
         self._forcedeltaparentprev = forcedeltaparentprev
@@ -1051,7 +1053,8 @@
                 fullclnodes=self._fullclnodes,
                 precomputedellipsis=self._precomputedellipsis)
 
-            yield tree, deltas
+            if not tree or not self._oldfilematcher.visitdir(store.tree[:-1] or '.'):
+                yield tree, deltas
 
     def _prunemanifests(self, store, nodes, commonrevs):
         # This is split out as a separate method to allow filtering
@@ -1151,12 +1154,13 @@
 
         progress.complete()
 
-def _makecg1packer(repo, filematcher, bundlecaps, ellipses=False,
-                   shallow=False, ellipsisroots=None, fullnodes=None):
+def _makecg1packer(repo, filematcher, oldfilematcher, bundlecaps,
+                   ellipses=False, shallow=False, ellipsisroots=None,
+                   fullnodes=None):
     builddeltaheader = lambda d: _CHANGEGROUPV1_DELTA_HEADER.pack(
         d.node, d.p1node, d.p2node, d.linknode)
 
-    return cgpacker(repo, filematcher, b'01',
+    return cgpacker(repo, filematcher, oldfilematcher, b'01',
                     builddeltaheader=builddeltaheader,
                     manifestsend=b'',
                     forcedeltaparentprev=True,
@@ -1166,12 +1170,13 @@
                     ellipsisroots=ellipsisroots,
                     fullnodes=fullnodes)
 
-def _makecg2packer(repo, filematcher, bundlecaps, ellipses=False,
-                   shallow=False, ellipsisroots=None, fullnodes=None):
+def _makecg2packer(repo, filematcher, oldfilematcher, bundlecaps,
+                   ellipses=False, shallow=False, ellipsisroots=None,
+                   fullnodes=None):
     builddeltaheader = lambda d: _CHANGEGROUPV2_DELTA_HEADER.pack(
         d.node, d.p1node, d.p2node, d.basenode, d.linknode)
 
-    return cgpacker(repo, filematcher, b'02',
+    return cgpacker(repo, filematcher, oldfilematcher, b'02',
                     builddeltaheader=builddeltaheader,
                     manifestsend=b'',
                     bundlecaps=bundlecaps,
@@ -1180,12 +1185,13 @@
                     ellipsisroots=ellipsisroots,
                     fullnodes=fullnodes)
 
-def _makecg3packer(repo, filematcher, bundlecaps, ellipses=False,
-                   shallow=False, ellipsisroots=None, fullnodes=None):
+def _makecg3packer(repo, filematcher, oldfilematcher, bundlecaps,
+                   ellipses=False, shallow=False, ellipsisroots=None,
+                   fullnodes=None):
     builddeltaheader = lambda d: _CHANGEGROUPV3_DELTA_HEADER.pack(
         d.node, d.p1node, d.p2node, d.basenode, d.linknode, d.flags)
 
-    return cgpacker(repo, filematcher, b'03',
+    return cgpacker(repo, filematcher, oldfilematcher, b'03',
                     builddeltaheader=builddeltaheader,
                     manifestsend=closechunk(),
                     bundlecaps=bundlecaps,
@@ -1253,12 +1259,14 @@
     return min(versions)
 
 def getbundler(version, repo, bundlecaps=None, filematcher=None,
-               ellipses=False, shallow=False, ellipsisroots=None,
-               fullnodes=None):
+               oldfilematcher=None, ellipses=False, shallow=False,
+               ellipsisroots=None, fullnodes=None):
     assert version in supportedoutgoingversions(repo)
 
     if filematcher is None:
         filematcher = matchmod.alwaysmatcher(repo.root, '')
+    if oldfilematcher is None:
+        oldfilematcher = matchmod.nevermatcher(repo.root, '')
 
     if version == '01' and not filematcher.always():
         raise error.ProgrammingError('version 01 changegroups do not support '
@@ -1275,7 +1283,7 @@
                                              filematcher)
 
     fn = _packermap[version][0]
-    return fn(repo, filematcher, bundlecaps, ellipses=ellipses,
+    return fn(repo, filematcher, oldfilematcher, bundlecaps, ellipses=ellipses,
               shallow=shallow, ellipsisroots=ellipsisroots,
               fullnodes=fullnodes)