diff --git a/include/sys/time.h b/include/sys/time.h
index 76ce5f03c..650166145 100644
--- a/include/sys/time.h
+++ b/include/sys/time.h
@@ -46,7 +46,7 @@
 #define	MSEC2NSEC(m)	((hrtime_t)(m) * (NANOSEC / MILLISEC))
 #define	NSEC2MSEC(n)	((n) / (NANOSEC / MILLISEC))
 
-#define	hz				HZ
+static const int hz = HZ;
 
 #define	TIMESPEC_OVERFLOW(ts)		\
 	((ts)->tv_sec < TIME_MIN || (ts)->tv_sec > TIME_MAX)