diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris.c b/sys/cddl/compat/opensolaris/kern/opensolaris.c
index 54118eb..640b2f3 100644
--- a/sys/cddl/compat/opensolaris/kern/opensolaris.c
+++ b/sys/cddl/compat/opensolaris/kern/opensolaris.c
@@ -40,6 +40,7 @@
 cpu_core_t	cpu_core[MAXCPU];
 kmutex_t	cpu_lock;
 solaris_cpu_t	solaris_cpu[MAXCPU];
+int		nsec_per_tick;
 
 /*
  *  OpenSolaris subsystem initialisation.
@@ -60,6 +61,8 @@ opensolaris_load(void *dummy)
 	}
 
 	mutex_init(&cpu_lock, "OpenSolaris CPU lock", MUTEX_DEFAULT, NULL);
+
+	nsec_per_tick = NANOSEC / hz;
 }
 
 SYSINIT(opensolaris_register, SI_SUB_OPENSOLARIS, SI_ORDER_FIRST, opensolaris_load, NULL);
diff --git a/sys/cddl/compat/opensolaris/sys/time.h b/sys/cddl/compat/opensolaris/sys/time.h
index fa1442c..bc24ec0 100644
--- a/sys/cddl/compat/opensolaris/sys/time.h
+++ b/sys/cddl/compat/opensolaris/sys/time.h
@@ -62,8 +62,21 @@ gethrtime(void)
 #define	gethrestime(ts)		getnanotime(ts)
 #define	gethrtime_waitfree()	gethrtime()
 
-#define	ddi_get_lbolt()		((gethrtime() * hz) / NANOSEC)
-#define	ddi_get_lbolt64()	(int64_t)((gethrtime() * hz) / NANOSEC)
+extern int nsec_per_tick;	/* nanoseconds per clock tick */
+
+static __inline int64_t
+ddi_get_lbolt64(void)
+{
+
+	return (gethrtime() / nsec_per_tick);
+}
+
+static __inline clock_t
+ddi_get_lbolt(void)
+{
+
+	return (ddi_get_lbolt64());
+}
 
 #else