fix issue 66
fix issue 66

giampaolo/psutil,jorik041/psutil,qbit/psutil,landryb/psutil,cloudbase/psutil,tomprince/psutil,0-wiz-0/psutil,msarahan/psutil,Q-Leap-Networks/psutil,giampaolo/psutil,packages/psutil,packages/psutil,landryb/psutil,mindw/psutil,tomprince/psutil,cloudbase/psutil,mindw/psutil,0-wiz-0/psutil,jorik041/psutil,qbit/psutil,jamesblunt/psutil,mrjefftang/psutil,mrjefftang/psutil,Q-Leap-Networks/psutil,tomprince/psutil,msarahan/psutil,tomprince/psutil,jamesblunt/psutil,qbit/psutil,jamesblunt/psutil,packages/psutil,cloudbase/psutil,mindw/psutil,mindw/psutil,landryb/psutil,msarahan/psutil,mrjefftang/psutil,tomprince/psutil,jorik041/psutil,landryb/psutil,mindw/psutil,landryb/psutil