diff --git a/homeassistant/components/onvif/device.py b/homeassistant/components/onvif/device.py index 35dc436d201..87b68508fa1 100644 --- a/homeassistant/components/onvif/device.py +++ b/homeassistant/components/onvif/device.py @@ -169,7 +169,9 @@ class ONVIFDevice: cdate = device_time.UTCDateTime else: tzone = ( - dt_util.get_time_zone(device_time.TimeZone) + dt_util.get_time_zone( + device_time.TimeZone or str(dt_util.DEFAULT_TIME_ZONE) + ) or dt_util.DEFAULT_TIME_ZONE ) cdate = device_time.LocalDateTime