diff --git a/sys/cam/cam_sim.c b/sys/cam/cam_sim.c
index c8843e24c825..b7e0ec5bdf56 100644
--- a/sys/cam/cam_sim.c
+++ b/sys/cam/cam_sim.c
@@ -53,7 +53,7 @@ cam_simq_free(struct cam_devq *devq)
 
 struct cam_sim *
 cam_sim_alloc(sim_action_func sim_action, sim_poll_func sim_poll,
-	      char *sim_name, void *softc, u_int32_t unit,
+	      const char *sim_name, void *softc, u_int32_t unit,
 	      int max_dev_transactions,
 	      int max_tagged_dev_transactions, struct cam_devq *queue)
 {
diff --git a/sys/cam/cam_sim.h b/sys/cam/cam_sim.h
index 95e6dcebd158..fb6b1a4c71d1 100644
--- a/sys/cam/cam_sim.h
+++ b/sys/cam/cam_sim.h
@@ -53,7 +53,7 @@ void		  cam_simq_free(struct cam_devq *devq);
 
 struct cam_sim *  cam_sim_alloc(sim_action_func sim_action,
 				sim_poll_func sim_poll,
-				char *sim_name,
+				const char *sim_name,
 				void *softc,
 				u_int32_t unit,
 				int max_dev_transactions,
@@ -67,11 +67,11 @@ void	cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id);
 
 
 /* Convenience routines for accessing sim attributes. */
-static __inline u_int32_t cam_sim_path(struct cam_sim *sim);
-static __inline char *	  cam_sim_name(struct cam_sim *sim);
-static __inline void *	  cam_sim_softc(struct cam_sim *sim);
-static __inline u_int32_t cam_sim_unit(struct cam_sim *sim);
-static __inline u_int32_t cam_sim_bus(struct cam_sim *sim);
+static __inline u_int32_t    cam_sim_path(struct cam_sim *sim);
+static __inline const char * cam_sim_name(struct cam_sim *sim);
+static __inline void *	     cam_sim_softc(struct cam_sim *sim);
+static __inline u_int32_t    cam_sim_unit(struct cam_sim *sim);
+static __inline u_int32_t    cam_sim_bus(struct cam_sim *sim);
 
 
 
@@ -88,7 +88,7 @@ static __inline u_int32_t cam_sim_bus(struct cam_sim *sim);
 struct cam_sim {
 	sim_action_func		sim_action;
 	sim_poll_func		sim_poll;
-	char			*sim_name;
+	const char		*sim_name;
 	void			*softc;
 	u_int32_t		path_id;/* The Boot device may set this to 0? */
 	u_int32_t		unit_number;
@@ -107,7 +107,7 @@ cam_sim_path(struct cam_sim *sim)
 	return (sim->path_id);
 }
 
-static __inline char *
+static __inline const char *
 cam_sim_name(struct cam_sim *sim)
 {
 	return (sim->sim_name);