diff -ur linesrv-2.1.orig/server/user_pam.c linesrv-2.1/server/user_pam.c
--- linesrv-2.1.orig/server/user_pam.c	2004-10-06 15:37:14.000000000 +0200
+++ linesrv-2.1/server/user_pam.c	2007-12-16 17:59:59.000000000 +0100
@@ -3,6 +3,7 @@
 #include <security/pam_appl.h>
 #include <string.h>
 #include <stdlib.h>
+#include <sys/syslog.h>
 #include "global_vars.h"
 
 static struct pam_conv pamconv;