--- pptp-1.8.0.orig/pqueue.c	2013-10-23 10:10:46.000000000 +0200
+++ pptp-1.8.0/pqueue.c	2013-12-22 11:35:52.000000000 +0100
@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
+#include <sys/types.h>
 
 #include "util.h" // for log()
 #include "pqueue.h"