BRUNOREM if the flight numbers are unchanged then the short answer is NO. One hour is accepted as a reasonable schedule change in accordance with the T and C's for your ticket. But you could contact your local office and ask. They usually provide customer service as opposed to DOH.

But be careful. Once when they changed my first flight to a later time I would arrive in DOH two hours AFTER my connection had departed. When I pointed this out they wanted me to pay change fees!