diff --git a/sys/kern/subr_param.c b/sys/kern/subr_param.c
index b5f732965dbf..ee764072d3b8 100644
--- a/sys/kern/subr_param.c
+++ b/sys/kern/subr_param.c
@@ -51,7 +51,7 @@ __FBSDID("$FreeBSD$");
  */
 
 #ifndef HZ
-#  if defined(__amd64__) || defined(__i386__) || defined(__ia64__)
+#  if defined(__amd64__) || defined(__i386__) || defined(__ia64__) || defined(__sparc64__)
 #    define	HZ 1000
 #  else
 #    define	HZ 100