--- Libnet-1.0.2a.orig/src/libnet_prand.c	2001-02-05 20:22:26.000000000 +0100
+++ Libnet-1.0.2a/src/libnet_prand.c	2009-06-12 21:48:27.000000000 +0200
@@ -30,6 +30,8 @@
  *
  */
  
+#include <stdlib.h>
+
 #if (HAVE_CONFIG_H)
 #include "../include/config.h"
 #endif