--- sendip.c.org	2010-05-11 11:09:17.000000000 +0200
+++ sendip.c	2010-05-11 11:10:34.000000000 +0200
@@ -48,9 +48,10 @@
 	ip->ihl		= (IPHDR_SIZE + optlen + 3) >> 2;
 	ip->tos		= ip_tos;
 
-#if defined OSTYPE_FREEBSD || defined OSTYPE_NETBSD || defined OSTYPE_BSDI
+#if defined OSTYPE_DARWIN || defined OSTYPE_FREEBSD || defined OSTYPE_NETBSD || defined OSTYPE_BSDI
 /* FreeBSD */
 /* NetBSD */
+/* Darwin */
 	ip->tot_len	= packetsize;
 #else
 /* Linux */
@@ -73,9 +74,10 @@
 			htons((unsigned short) src_id);
 	}
 
-#if defined OSTYPE_FREEBSD || defined OSTYPE_NETBSD | defined OSTYPE_BSDI
+#if defined OSTYPE_DARWIN || defined OSTYPE_FREEBSD || defined OSTYPE_NETBSD || defined OSTYPE_BSDI
 /* FreeBSD */
 /* NetBSD */
+/* Darwin */
 	ip->frag_off	|= more_fragments;
 	ip->frag_off	|= fragoff >> 3;
 #else