diff -ruN --exclude=CVS /usr/ports/net-mgmt/nfdump.orig/Makefile /usr/ports/net-mgmt/nfdump/Makefile
--- /usr/ports/net-mgmt/nfdump.orig/Makefile	2010-01-23 02:11:38.000000000 +0100
+++ /usr/ports/net-mgmt/nfdump/Makefile	2010-01-26 17:44:59.000000000 +0100
@@ -23,6 +23,12 @@
 
 .include <bsd.port.pre.mk>
 
+#for compatibility
+#
+.ifndef(WITHOUT_NFDUMP15_SUPPORT)
+CONFIGURE_ARGS=		--enable-compat15
+.endif
+
 PLIST_FILES=	bin/nfcapd bin/nfdump bin/nfreplay bin/nfexpire
 MAN1=		nfcapd.1 nfdump.1 nfreplay.1 nfexpire.1
 MAN1+=		nfprofile.1 ft2nfdump.1 sfcapd.1