diff --git a/highwayhash/os_specific.cc b/highwayhash/os_specific.cc
index 9cca726..589f324 100644
--- a/highwayhash/os_specific.cc
+++ b/highwayhash/os_specific.cc
@@ -51,8 +51,8 @@
 
 #ifdef __FreeBSD__
 #define OS_FREEBSD 1
-#include <sys/cpuset.h>
 #include <sys/param.h>
+#include <sys/cpuset.h>
 #include <unistd.h>
 #else
 #define OS_FREEBSD 0