HBe seroconversion is an important goal for anti-HBV treatment, since it is associated with a non progressive liver infection and a better clinical outcome. However, the rate of HBe seroconversion is low in HIV-HBV co-infected patients, mostly treated by tenofovir and emtricitabine. This study will evaluate the efficacy and the safety of a one-year Peg-interferon alpha 2a additional treatment in patients already treated by tenofovir and emtricitabine without reaching HBe seroconversion.