diff -c -r postfix-2.6.5.orig/makedefs postfix-2.6.5/makedefs
*** postfix-2.6.5.orig/makedefs	Mon May 11 21:26:46 2009
--- postfix-2.6.5/makedefs	Fri Jan  1 14:07:16 2010
***************
*** 144,149 ****
--- 144,151 ----
  		;;
    FreeBSD.7*)	SYSTYPE=FREEBSD7
  		;;
+   FreeBSD.8*)	SYSTYPE=FREEBSD8
+ 		;;
    OpenBSD.2*)	SYSTYPE=OPENBSD2
  		;;
    OpenBSD.3*)	SYSTYPE=OPENBSD3
diff -c -r postfix-2.6.5.orig/src/util/sys_defs.h postfix-2.6.5/src/util/sys_defs.h
*** postfix-2.6.5.orig/src/util/sys_defs.h	Mon May 11 00:45:27 2009
--- postfix-2.6.5/src/util/sys_defs.h	Fri Jan  1 14:07:24 2010
***************
*** 25,30 ****
--- 25,31 ----
    */
  #if defined(FREEBSD2) || defined(FREEBSD3) || defined(FREEBSD4) \
      || defined(FREEBSD5) || defined(FREEBSD6) || defined(FREEBSD7) \
+     || defined(FREEBSD8) \
      || defined(BSDI2) || defined(BSDI3) || defined(BSDI4) \
      || defined(OPENBSD2) || defined(OPENBSD3) || defined(OPENBSD4) \
      || defined(NETBSD1) || defined(NETBSD2) || defined(NETBSD3) \
***************
*** 110,115 ****
--- 111,120 ----
  #define HAS_DUPLEX_PIPE			/* 4.1 breaks with kqueue(2) */
  #endif
  
+ #if __FreeBSD_version >= 800000
+ #define HAS_CLOSEFROM
+ #endif
+ 
  /* OpenBSD version is year+month */
  
  #if OpenBSD >= 199805			/* XXX */