diff --git a/sys/dev/random/random_harvestq.h b/sys/dev/random/random_harvestq.h
--- a/sys/dev/random/random_harvestq.h
+++ b/sys/dev/random/random_harvestq.h
@@ -40,8 +40,4 @@
 	uint8_t		he_source;		/* origin of the entropy */
 };
 
-#define	RANDOM_HARVEST_INIT_LOCK(x)	mtx_init(&harvest_context.hc_mtx, "entropy harvest mutex", NULL, MTX_SPIN)
-#define	RANDOM_HARVEST_LOCK(x)		mtx_lock_spin(&harvest_context.hc_mtx)
-#define	RANDOM_HARVEST_UNLOCK(x)	mtx_unlock_spin(&harvest_context.hc_mtx)
-
 #endif /* SYS_DEV_RANDOM_RANDOM_HARVESTQ_H_INCLUDED */
diff --git a/sys/dev/random/random_harvestq.c b/sys/dev/random/random_harvestq.c
--- a/sys/dev/random/random_harvestq.c
+++ b/sys/dev/random/random_harvestq.c
@@ -161,6 +161,11 @@
 	} hc_entropy_fast_accumulator;
 } harvest_context;
 
+#define	RANDOM_HARVEST_INIT_LOCK()	mtx_init(&harvest_context.hc_mtx, \
+					    "entropy harvest mutex", NULL, MTX_SPIN)
+#define	RANDOM_HARVEST_LOCK()		mtx_lock_spin(&harvest_context.hc_mtx)
+#define	RANDOM_HARVEST_UNLOCK()		mtx_unlock_spin(&harvest_context.hc_mtx)
+
 static struct kproc_desc random_proc_kp = {
 	"rand_harvestq",
 	random_kthread,