Joining the Jamaat in Ruku

Q. I am about to join the jamaat while the Imam is making ruk'u. What must I do? If I join the jamaat in the ruk'u, is this Rak'at counted or do I have to replace it?

R. One must make the takbir Tahreema (first takbir) and join the Imam in the ruk'u. It is not necessary to replace this Rak'at because it is valid.

[English version of " Se joindre au jamaate dans le rouk'ou " – Al Haadi – Vol. 1 No. 3]