I think someone here is being too much of a grammar Nazi. No names, no pack drill. It's such a minor thing, as a native speaker of Russian, I wouldn't have even noticed it if someone hadn't started to kick up a stink about it. The more I repeat the "incorrect" phrase to myself, the less incorrect it sounds to me. Who knows, I might have even heard people say so. At any rate, it's definitely NOT the kind of mistake that could make you stand out as a foreigner. Even if it is a mistake, it's not what the common Russian in the street will notice.