diff --git a/src/include/bsd_auth.h b/src/include/bsd_auth.h
index 3df28950..800ec13c 100644
--- a/src/include/bsd_auth.h
+++ b/src/include/bsd_auth.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: bsd_auth.h,v 1.7 2002/06/07 03:11:31 miod Exp $	*/
+/*	$OpenBSD: bsd_auth.h,v 1.8 2002/08/30 08:50:01 espie Exp $	*/
 
 /*-
  * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
@@ -58,7 +58,9 @@ char	*auth_getitem(auth_session_t *, auth_item_t);
 int	 auth_setitem(auth_session_t *, auth_item_t, char *);
 
 auth_session_t *auth_open(void);
-auth_session_t *auth_verify(auth_session_t *, char *, char *, ...);
+auth_session_t *auth_verify(auth_session_t *, char *, char *, ...)
+		    __attribute__((sentinel));
+
 auth_session_t *auth_userchallenge(char *, char *, char *, char **);
 auth_session_t *auth_usercheck(char *, char *, char *, char *);
 
@@ -76,7 +78,8 @@ void	 auth_setenv(auth_session_t *);
 void	 auth_clrenv(auth_session_t *);
 
 void	 auth_setstate(auth_session_t *, int);
-int	 auth_call(auth_session_t *, char *, ...);
+int	 auth_call(auth_session_t *, char *, ...) 
+	    __attribute__((sentinel));
 
 int	 auth_setdata(auth_session_t *, void *, size_t);
 int	 auth_setoption(auth_session_t *, char *, char *);