Changing HTTP Listener Port on Oracle Express 10g

The oracle installer does not give you the chance to change the port of the HTTP Listener. I installed my Oracle 10g Express Edition under Windows and my Tomcat Servlet Container already uses port 8080.
So I decided to change the port of the Oracle HTTP listener doing the following with SQLPlus:

C:\>sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Sat Sep 10 18:49:14 2006

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production

SQL> exec dbms_xdb.sethttpport(8081);

PL/SQL procedure successfully completed.

SQL>