--- preauthpam.c.orig	Thu May 12 17:28:18 2016
+++ preauthpam.c	Thu May 12 17:40:29 2016
@@ -31,7 +31,7 @@ struct spwd *spw;
 
 	memset(&auth, 0, sizeof(auth));
 
-	if ((pw=getpwnam(userid)) == 0)
+	if ((pw=getpwnam_shadow(userid)) == 0)
 	{
 		if (errno == ENOMEM)	return (1);
 		DPRINTF("authpam: username '%s' not found in password file", userid);