A man in the Netherlands was arrested last week for not having snow on his roof - which exposed a massive marijuana grow house operation inside.

Dutch authorities were drawn to the suspicious house in Haarlem town because it was the only one in a row of homes with the same roof that didn't have snow on top, The Telegraph reported.

A raid was conducted on the home last Thursday and revealed a stockpile of marijuana plants growing under heated lamps.

It's unclear how much pot was found in the house, but it was way over the legal limit in the Netherlands. Only five cannabis plants are allowed inside homes and people are allowed to carry no more than five grams of weed, according to The Telegraph.

Police arrested the unnamed lawbreaker and tweeted an image of the home and its mysterious U-shaped patch of missing snow.

This isn't the first time missing snow helped Dutch police bust illegal grow houses during the winter months. A snow-less roof in the city of Zutphen two weeks ago revealed a cannabis farm with 88 marijuana plants in one bedroom, The Telegraph reported. The same thing led to another person being arrested in Arnhem two days later.