--- pcaputil.c.orig	2005-12-20 22:51:13.000000000 +0100
+++ pcaputil.c	2005-12-20 22:52:30.000000000 +0100
@@ -26,6 +26,8 @@
 
 #include "pcaputil.h"
 
+#define BIOCIMMEDIATE _IOW('B',112, u_int)
+
 pcap_t *
 pcap_open(char *device)
 {