Index: yara/libyara/proc.c
===================================================================
--- yara.orig/libyara/proc.c	2014-03-23 14:48:31.421970668 +0100
+++ yara/libyara/proc.c	2014-03-23 14:50:33.706854027 +0100
@@ -152,7 +152,7 @@
 #include "mem.h"
 #include "proc.h"
 
-#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__MACH__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__MACH__)
 #define PTRACE_ATTACH PT_ATTACH
 #define PTRACE_DETACH PT_DETACH
 #endif
