diff -ur linux-2.5.72.v/drivers/isdn/i4l/isdn_tty.c linux/drivers/isdn/i4l/isdn_tty.c
--- linux-2.5.72.v/drivers/isdn/i4l/isdn_tty.c	2003-06-16 21:20:19.000000000 -0700
+++ linux/drivers/isdn/i4l/isdn_tty.c	2003-06-19 10:26:13.000000000 -0700
@@ -1195,7 +1195,6 @@
 	int c;
 	int total = 0;
 	modem_info *info = (modem_info *) tty->driver_data;
-	atemu *m = &info->emu;
 
 	if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
 		return 0;
@@ -2096,10 +2095,10 @@
 		kfree(info->xmit_buf - 4);
 	}
  err_unregister_tty:
-	tty_unregister_driver(&isdn_mdm->tty_modem);
+	tty_unregister_driver(&isdn_mdm.tty_modem);
  err:
-	put_tty_driver(&isdn_mdm->tty_modem);
-	isdn_mdm->tty_modem = NULL;
+	put_tty_driver(&isdn_mdm.tty_modem);
+	isdn_mdm.tty_modem = NULL;
 	return retval;
 }
 
@@ -2118,9 +2117,9 @@
 #endif
 		kfree(info->xmit_buf - 4);
 	}
-	tty_unregister_driver(&isdn_mdm->tty_modem);
-	put_tty_driver(&isdn_mdm->tty_modem);
-	isdn_mdm->tty_modem = NULL;
+	tty_unregister_driver(&isdn_mdm.tty_modem);
+	put_tty_driver(&isdn_mdm.tty_modem);
+	isdn_mdm.tty_modem = NULL;
 }
 
 /*