fixed issue #875
fixed issue #875

USGSDenverPychron/pychron,USGSDenverPychron/pychron,NMGRL/pychron,NMGRL/pychron,NMGRL/pychron,USGSDenverPychron/pychron,NMGRL/pychron,UManPychron/pychron,UManPychron/pychron,UManPychron/pychron,UManPychron/pychron,USGSDenverPychron/pychron