Having previously stated that Giroud must secure more minutes at Chelsea to warrant a place in his Euros squad, Deschamps says the striker must "take advantage" of the rising number of opportunities Frank Lampard is currently handing him.
Deschamps said: "We often talk about Olivier; he is often criticised. A lot of the things said about him are unfair and he has this strength of character.
"When we call on him he scores and when he doesn't score he is still useful. It's a much happier time for him. Good for him, it was not the case when he came in selection.
"What other people say, everyone is free to think what they want. Just look at the number of goals he has scored."
Speaking of the rising number of opportunities Lampard has handed Giroud, Deschamps said: "I'm happy for him and I'm hoping it can last.
"If Lampard decides to have him play three days a week, that's not ideal either.
"The happy medium is good, that he takes advantage of this ideal period for him. He is one of the very best attackers at international level."