Benefit: […] You can also use your shield arm to wield a weapon (whether you are using an offhand weapon or using your off hand to help wield a two-handed weapon), but you take a –1 penalty on attack rolls while doing so. This penalty stacks with those that may apply for fighting with your off hand and for fighting with two weapons. […]
Is there a way to avoid this -1 penalty? I've searched along the web and found nothing, but maybe I'm missing something. Could be a feat, or a magic item maybe?