diff --git a/poky/bitbake/lib/prserv/serv.py b/poky/bitbake/lib/prserv/serv.py
index 2bc6890..b854ba1 100644
--- a/poky/bitbake/lib/prserv/serv.py
+++ b/poky/bitbake/lib/prserv/serv.py
@@ -243,6 +243,7 @@
         try:
             pid = os.fork()
             if pid > 0:
+                self.socket.close() # avoid ResourceWarning in parent
                 return pid
         except OSError as e:
             raise Exception("%s [%d]" % (e.strerror, e.errno))