diff --git a/poky/bitbake/lib/prserv/serv.py b/poky/bitbake/lib/prserv/serv.py
index be3acec..2bc6890 100644
--- a/poky/bitbake/lib/prserv/serv.py
+++ b/poky/bitbake/lib/prserv/serv.py
@@ -379,9 +379,8 @@
     ip = socket.gethostbyname(host)
     pidfile = PIDPREFIX % (ip, port)
     try:
-        pf = open(pidfile,'r')
-        pid = int(pf.readline().strip())
-        pf.close()
+        with open(pidfile) as pf:
+            pid = int(pf.readline().strip())
     except IOError:
         pid = None