diff -ur samba-3.5.10/source3/libsmb/smb_signing.c samba-3.5.10_mod/source3/libsmb/smb_signing.c
--- samba-3.5.10/source3/libsmb/smb_signing.c	2011-07-25 05:04:44.000000000 +0900
+++ samba-3.5.10_mod/source3/libsmb/smb_signing.c	2011-09-08 18:46:08.253549719 +0900
@@ -70,7 +70,8 @@
 
 	si->allowed = allowed;
 	si->mandatory = mandatory;
-
+	if (si->allowed || si->mandatory)
+		si->bsrspyl = true;
 	return si;
 }