Ross Ford admits Scotland must clean up their act or face further heartache following their self-inflicted pain in Paris.
The hooker and the rest of his Dark Blue colleagues blew a great chance to end their 16-year wait for a victory in the French capital on Saturday as they lost 15-8.
While Scots sub Dougie Fife scored the only try of the match, Les Bleus were able to claim a Six Nations opening weekend win as Camille Lopez booted over five of the six penalties handed to him.
Wales are next up at BT Murrayfield for Vern Cotter's men and Ford knows Scotland must be on their best behaviour.
The Edinburgh front-rower said: "It is frustrating but no-one actively looks to go in and give away stupid penalties.
"At times when you are really under the pump there is a professional way of looking at it, when giving away penalties can be useful. But that's not what Saturday was about at all.
"It was just boys trying their best. It's not a closed skill, there are so many outside factors."