Long-Term Statistics Telldus Sensor


I am running Home assistant on a Raspberry Pi 4 with external SSD. Switched from Openhab to Home Assistant this summer and so far I am happy with my choice. One thing I am having trouble with however is statistics of my telldus 443mhz sensors. They do not have a state_class. I have tried to figure out how to configure this, but have not succeeded. Hopefully someone can point me in the right direction.