diff --git a/auth-bsdauth.c b/auth-bsdauth.c
index 2ac27a7..920c977 100644
--- a/auth-bsdauth.c
+++ b/auth-bsdauth.c
@@ -22,7 +22,7 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include "includes.h"
-RCSID("$OpenBSD: auth-bsdauth.c,v 1.5 2002/06/30 21:59:45 deraadt Exp $");
+RCSID("$OpenBSD: auth-bsdauth.c,v 1.6 2005/01/19 13:11:47 dtucker Exp $");
 
 #ifdef BSD_AUTH
 #include "xmalloc.h"
@@ -83,6 +83,9 @@
 	Authctxt *authctxt = ctx;
 	int authok;
 
+	if (!authctxt->valid)
+		return -1;
+
 	if (authctxt->as == 0)
 		error("bsdauth_respond: no bsd auth session");