WASHINGTON (AP) — The House voted Wednesday in support of making it easier for banks to do business with legal pot shops and providers of medical marijuana.

The 236-186 vote rejected a move by Rep. John Fleming, R-La., to block the Treasury Department from implementing guidance it issued in February telling banks how to report on their dealings with marijuana-related businesses without running afoul of federal money-laundering laws.

Marijuana dealing is still against federal law so banks who do business with marijuana dispensaries could be accused of helping them launder their money. Federal money laundering convictions can mean decades in prison.

The Treasury guidance was intended to give banks confidence that they can deal with marijuana businesses in states where they’re legal. Many banks are still reluctant to do so.

That has forced marijuana operations to stockpile cash, a situation that shop owners say is dangerous.

“They are operating just in cash, which creates its own potential for crime, robbery, assault and battery,” said Rep. Earl Perlmutter, D-Colo., whose state has legalized recreational pot use. “You cannot track the money. There is skimming and tax evasion. So the guidance by the Justice Department and the guidance by the Treasury Department is to bring this out into the open.”

The vote is largely symbolic since Treasury already had gone ahead with the guidance, but it demonstrates a loosening of anti-marijuana sentiment on Capitol Hill.

The underlying measure, however, would block the District of Columbia government from implementing a local law decriminalizing pot possession. The D.C. City Council approved a measure reducing the penalty for possession of up to an ounce of marijuana to a $25 fine.

That provision by Rep. Andy Harris, R-Md., also would block the city from legalizing pot as Colorado and Washington have done.