diff --git a/mercurial/scmutil.py b/mercurial/scmutil.py
--- a/mercurial/scmutil.py
+++ b/mercurial/scmutil.py
@@ -219,6 +219,9 @@ class abstractvfs(object):
     def mkdir(self, path=None):
         return os.mkdir(self.join(path))
 
+    def readdir(self, path=None, stat=None, skip=None):
+        return osutil.listdir(self.join(path), stat, skip)
+
     def stat(self, path=None):
         return os.stat(self.join(path))
 
diff --git a/mercurial/store.py b/mercurial/store.py
--- a/mercurial/store.py
+++ b/mercurial/store.py
@@ -6,7 +6,7 @@
 # GNU General Public License version 2 or any later version.
 
 from i18n import _
-import osutil, scmutil, util, parsers
+import scmutil, util, parsers
 import os, stat, errno
 
 _sha = util.sha1
@@ -311,9 +311,10 @@ class basicstore(object):
         l = []
         if self.rawvfs.isdir(path):
             visit = [path]
+            readdir = self.rawvfs.readdir
             while visit:
                 p = visit.pop()
-                for f, kind, st in osutil.listdir(p, stat=True):
+                for f, kind, st in readdir(p, stat=True):
                     fp = p + '/' + f
                     if kind == stat.S_IFREG and f[-2:] in ('.d', '.i'):
                         n = util.pconvert(fp[striplen:])