diff --git a/zebra/main.c b/zebra/main.c
index 14b0273..2d6a4ac 100644
--- a/zebra/main.c
+++ b/zebra/main.c
@@ -382,6 +382,9 @@
   /* Needed for BSD routing socket. */
   pid = getpid ();
 
+  /* This must be done only after locking pidfile (bug #403). */
+  zebra_zserv_socket_init ();
+
   /* Make vty server socket. */
   vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH);