A Seattle man was slapped with a $138 ticket for warning drivers to slow down.

Daniel Gehlke held the handwritten sign near 14th Avenue S. and S. Washington Street to warn drivers of a hidden speed trap.

The sign, made out of a Rubbermaid top, read, “Cops ahead! Stop at sign and light!”

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Police took issue with the word ‘stop,’ saying that it’s illegal to hold signs that say ‘stop,’ ‘slow,’ or ‘danger.’

But Gehlke said he just wanted to encourage drivers to follow the rules of the road.

Gehlke plans to fight the ticket.