diff -ruN --exclude=CVS /usr/ports/net-mgmt/nfdump.orig/Makefile /usr/ports/net-mgmt/nfdump/Makefile
--- /usr/ports/net-mgmt/nfdump.orig/Makefile	2008-08-22 17:18:46.000000000 +0200
+++ /usr/ports/net-mgmt/nfdump/Makefile	2009-03-10 10:17:52.000000000 +0100
@@ -7,6 +7,7 @@
 
 PORTNAME=	nfdump
 PORTVERSION=	1.5.7
+PORTREVISION=	1
 CATEGORIES=	net-mgmt
 MASTER_SITES=	${MASTER_SITE_SOURCEFORGE}
 MASTER_SITE_SUBDIR=	${PORTNAME}
diff -ruN --exclude=CVS /usr/ports/net-mgmt/nfdump.orig/files/patch-util.c /usr/ports/net-mgmt/nfdump/files/patch-util.c
--- /usr/ports/net-mgmt/nfdump.orig/files/patch-util.c	1970-01-01 01:00:00.000000000 +0100
+++ /usr/ports/net-mgmt/nfdump/files/patch-util.c	2009-03-10 17:25:50.000000000 +0100
@@ -0,0 +1,21 @@
+
+$FreeBSD$
+
+--- util.c.orig
++++ util.c
+@@ -301,6 +301,7 @@
+ static char timestring[16];
+ 
+ 	when = localtime(&t);
++	when->tm_isdst = -1;
+ 	snprintf(timestring, 15, "%i%02i%02i%02i%02i", 
+ 		when->tm_year + 1900, when->tm_mon + 1, when->tm_mday, when->tm_hour, when->tm_min);
+ 	timestring[15] = '\0';
+@@ -320,6 +321,7 @@
+ 	when.tm_sec  = 0;
+ 	when.tm_wday = 0;
+ 	when.tm_yday = 0;
++	when.tm_isdst = -1;
+ 
+ 	if ( strlen(timestring) != 12 ) {
+ 		LogError( "Wrong time format '%s'\n", timestring);