--- a/hgext/gpg.py	Wed Dec 28 23:42:50 2016 +0100
+++ b/hgext/gpg.py	Wed Mar 15 00:28:21 2017 -0700
@@ -281,7 +281,7 @@
             raise error.Abort(_("working copy of .hgsigs is changed "),
                              hint=_("please commit .hgsigs manually"))
 
-    sigsfile = repo.wfile(".hgsigs", "ab")
+    sigsfile = repo.wvfs(".hgsigs", "ab")
     sigsfile.write(sigmessage)
     sigsfile.close()