"The game against Scotland is even more important than the game against England. We need to win in order to prove ourselves," said Maso.
"This is the most important game of the season. If we beat Scotland we will set ourselves up for a great occasion against Ireland at the Stade de France."
Stade Francais lock David Auradou has neen ruled out with a thumb injury and Beziers second row Thibault Privat is recalled to the squad after missing the game against England through injury.
Auradou's Stade Francais team mate Pieter de Villers is named in the party despite carrying an ankle injury, but French coach Bernard Laporte has added Narbonne prop Jean-Baptiste Poux to his squad ahead of Toulouse hooker Yannick Bru.
French Squad (v Scotland) .
Backs: Nicolas Brusque (Biarritz), David Bory (Montferrand), Aurelien Rougerie (Montferrand), Damien Traille (Pau), Tony Marsh (Montferrand), Gerald Merceron (Montferrand), Francois Gelez (Agen), Jimmy Marlu (Montferrand), Stephane Glas (Bourgoin), Pierre Mignoni (Beziers), Fabien Galthie (Stade Francais, captain).
Forwards: Jean-Jacques Crenca (Agen), Pieter de Villiers (Stade Francais), Raphael Ibanez (Castres), Olivier Azam (Gloucester), Olivier Milloud (Bourgoin), Thibault Privat (Beziers), Fabien Pelous (Toulouse), Stephen Hall (Beziers), Olivier Brouzet (Northampton Saints), Remy Martin (Stade Francais), Olivier Magne (Montferrand), Jean-Baptiste Poux (Narbonne), Imanol Harinordoquy (Pau), Serge Betsen (Biarritz).