--- preauthpwd.c.orig	Thu May 12 17:28:26 2016
+++ preauthpwd.c	Thu May 12 17:40:12 2016
@@ -28,7 +28,7 @@ struct passwd *pw;
 
 	memset(&auth, 0, sizeof(auth));
 
-	if ((pw=getpwnam(userid)) == 0)
+	if ((pw=getpwnam_shadow(userid)) == 0)
 	{
 		if (errno == ENOMEM)	return (1);
 		return (-1);