Index: head/security/masscan/files/patch-src_smack1.c
===================================================================
--- head/security/masscan/files/patch-src_smack1.c	(revision 555979)
+++ head/security/masscan/files/patch-src_smack1.c	(revision 555980)
@@ -1,11 +1,11 @@
 --- src/smack1.c.orig	2017-06-06 03:59:39 UTC
 +++ src/smack1.c
 @@ -115,6 +115,8 @@
  #include "pixie-timer.h"
  #if defined(_MSC_VER)
  #include <intrin.h>
-+#elif defined(__llvm__)
++#elif defined(__llvm__) && (defined(__amd64__) || defined(__i386__))
 +#include <x86intrin.h>
  #elif defined(__GNUC__)
  static __inline__ unsigned long long __rdtsc(void)
  {