Was it incorrect? I suppose it'd be because the 'stem' (I can't remember the right word now, sorry) of houden is actually houd, so then normally you'd say ik houd.
According to the following website (in Dutch), hou is correct as well, just more informal:
And here (more detailed information, same website):
The Taal Unie says pretty much about the same, as far as I can understand: http://taaladvies.net/taal/advies/vraag/397/houd_op_ik_houd_daar_niet_van/