fixes #507
fixes #507

crossbario/autobahn-python,meejah/AutobahnPython,oberstet/autobahn-python,ttimon7/AutobahnPython,tavendo/AutobahnPython,RyanHope/AutobahnPython,schoonc/AutobahnPython,nucular/AutobahnPython,Geoion/AutobahnPython,jvdm/AutobahnPython,Jenselme/AutobahnPython,markope/AutobahnPython,oberstet/autobahn-python,oberstet/autobahn-python,crossbario/autobahn-python,crossbario/autobahn-python