diff -r a6db1163befa -r 14033c5dd261 mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Mon Feb 08 00:47:36 2016 +0000
+++ b/mercurial/cmdutil.py	Wed Feb 03 09:11:22 2016 +0000
@@ -796,7 +796,7 @@
         initfn()
 
     if not opts['daemon']:
-        writepid(os.getpid())
+        writepid(util.getpid())
 
     if opts['daemon_pipefds']:
         lockpath = opts['daemon_pipefds']