diff --git a/net-mgmt/p0f/files/patch-process.c b/net-mgmt/p0f/files/patch-process.c
index fea6321a09b9..45e2e41e749b 100644
--- a/net-mgmt/p0f/files/patch-process.c
+++ b/net-mgmt/p0f/files/patch-process.c
@@ -1,21 +1,29 @@
---- process.c.orig	2012-01-16 22:43:57.000000000 -0500
-+++ process.c	2012-03-18 16:01:24.966689978 -0400
-@@ -22,6 +22,9 @@
+--- process.c.orig	2016-04-16 01:18:17 UTC
++++ process.c
+@@ -8,6 +8,7 @@
+ 
+  */
+ 
++#include <stddef.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <unistd.h>
+@@ -22,6 +23,9 @@
  #include <arpa/inet.h>
  #include <sys/time.h>
  #include <sys/stat.h>
 +#include <net/if.h>
 +#include <net/pfvar.h>
 +#include <net/if_pflog.h>
  
  #include "types.h"
  #include "config.h"
-@@ -106,7 +109,7 @@
+@@ -106,7 +110,7 @@ static void find_offset(const u8* data, s32 total_len)
      case DLT_LINUX_SLL:  link_off = 16; return;
  #endif /* DLT_LINUX_SLL */
  
 -    case DLT_PFLOG:      link_off = 28; return;
 +    case DLT_PFLOG:      link_off = PFLOG_HDRLEN; return;
  
      case DLT_IEEE802_11: link_off = 32; return;
    }