diff --git a/sys/cam/cam_sim.h b/sys/cam/cam_sim.h
index 956084c41da5..4becc715f13e 100644
--- a/sys/cam/cam_sim.h
+++ b/sys/cam/cam_sim.h
@@ -107,9 +107,6 @@ struct cam_sim {
 	device_t		sim_dev; /* For attached peripherals. */
 };
 
-#define CAM_SIM_LOCK(sim)	mtx_lock((sim)->mtx)
-#define CAM_SIM_UNLOCK(sim)	mtx_unlock((sim)->mtx)
-
 static __inline u_int32_t
 cam_sim_path(const struct cam_sim *sim)
 {