OO 2.4.0 does not build

[Marco Beishuizen]

# portupgrade openoffice.org
--->  Upgrading 'openoffice.org-2.3.1_1' to 'openoffice.org-2.4.0_3' (editors/openoffice.org-2)
--->  Building '/usr/ports/editors/openoffice.org-2'
===>  Cleaning for openoffice.org-2.4.0_3
openoffice.org-2.4.0_3: Environment error: "JAVA_HOME" should not be defined.
*** Error code 1

Where can the environment of java be changed?

Thanks,

Marco
-- 
And I suppose the little things are harder to get used to than the big
ones.  The big ones you get used to, you make up your mind to them.  The
little things come along unexpectedly, when you aren't thinking about
them, aren't braced against them.
		-- Marion Zimmer Bradley, "The Forbidden Tower"