The farmer seems to have bothered that the stone was in the way of his tractor when he decided to move it.
The only crux is that he moved it into French soil.
"He made Belgium bigger and France smaller, not a good idea," David Lavaux, mayor of the Belgian village of Erquelinnes, told French television.
"I got happy"
However, the event has been received with humor, in both countries.
- I was happy, my city got bigger, says the mayor, who says that the feeling was probably not shared by the mayor of the French city who got smaller.
Belgian authorities are now planning to contact the farmer to ask him to put the stone back in the right place.
If he refuses, legal action can be taken against him.
But if the farmer is compliant, everything will be calm, according to the mayor of the French city of Aurélie Welonek.
- He will not have any problems, we will solve this peacefully.
The border between Belgium and France was formally established in 1820 and stretches 620 kilometers.
But the stone, which was moved by the farmer, was put into the ground as early as 1819.