diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index e4133f52166..88e759f0d3f 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)kern_synch.c	8.9 (Berkeley) 5/19/95
- * $Id: kern_synch.c,v 1.38 1997/09/02 20:05:43 bde Exp $
+ * $Id: kern_synch.c,v 1.39 1997/09/21 22:00:14 gibbs Exp $
  */
 
 #include "opt_ktrace.h"
@@ -327,7 +327,7 @@ int
 tsleep(ident, priority, wmesg, timo)
 	void *ident;
 	int priority, timo;
-	char *wmesg;
+	const char *wmesg;
 {
 	struct proc *p = curproc;
 	int s, sig, catch = priority & PCATCH;
diff --git a/sys/sys/proc.h b/sys/sys/proc.h
index 2bdd97abf3f..add0efa6b63 100644
--- a/sys/sys/proc.h
+++ b/sys/sys/proc.h
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)proc.h	8.15 (Berkeley) 5/19/95
- * $Id: proc.h,v 1.45 1997/10/12 20:26:03 phk Exp $
+ * $Id: proc.h,v 1.46 1997/11/06 19:29:45 phk Exp $
  */
 
 #ifndef _SYS_PROC_H_
@@ -126,7 +126,7 @@ struct	proc {
 	int	p_cpticks;	 /* Ticks of cpu time. */
 	fixpt_t	p_pctcpu;	 /* %cpu for this process during p_swtime */
 	void	*p_wchan;	 /* Sleep address. */
-	char	*p_wmesg;	 /* Reason for sleep. */
+	const char *p_wmesg;	 /* Reason for sleep. */
 	u_int	p_swtime;	 /* Time swapped in or out. */
 	u_int	p_slptime;	 /* Time since last blocked. */
 
diff --git a/sys/sys/systm.h b/sys/sys/systm.h
index d4867d7ce4f..474f945f82e 100644
--- a/sys/sys/systm.h
+++ b/sys/sys/systm.h
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)systm.h	8.7 (Berkeley) 3/29/95
- * $Id: systm.h,v 1.61 1997/10/10 18:15:47 phk Exp $
+ * $Id: systm.h,v 1.62 1997/11/18 15:16:54 bde Exp $
  */
 
 #ifndef _SYS_SYSTM_H_
@@ -261,7 +261,7 @@ extern watchdog_tickle_fn	wdog_tickler;
  * Common `proc' functions are declared here so that proc.h can be included
  * less often.
  */
-int	tsleep __P((void *chan, int pri, char *wmesg, int timo));
+int	tsleep __P((void *chan, int pri, const char *wmesg, int timo));
 void	wakeup __P((void *chan));
 
 #endif /* !_SYS_SYSTM_H_ */