--- libsmb/clireadwrite.c.orig  2006-01-14 13:54:11.000000000 -0500
+++ libsmb/clireadwrite.c       2006-01-14 13:57:53.000000000 -0500
@@ -50,7 +50,7 @@
        SSVAL(cli->outbuf,smb_mid,cli->mid + i);
 
        if (bigoffset)
-               SIVAL(cli->outbuf,smb_vwv10,(offset>>32) & 0xffffffff);
+               SIVAL(cli->outbuf,smb_vwv10,((SMB_BIG_UINT)offset>>32) & 0xffffffff);
 
        return cli_send_smb(cli);
 }
@@ -303,7 +303,7 @@
              smb_buf(cli->outbuf) - smb_base(cli->outbuf));
 
        if (large_writex)
-               SIVAL(cli->outbuf,smb_vwv12,(offset>>32) & 0xffffffff);
+               SIVAL(cli->outbuf,smb_vwv12,((SMB_BIG_UINT)offset>>32) & 0xffffffff);
        
        p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11);
        memcpy(p, buf, size);