I lose “unicodeness” when qDebug()ing after instancing a QApplication

I am losing the capability of printing unicode characters right after instancing a QApplication object.

From the following code and having included all the needed libraries:

int main(int argc, char** argv)
{   
    qDebug() << "aeiou áéíóú";
    QApplication app(argc, argv);
    qDebug() << "aeiou áéíóú";
    return 0;
}

I am getting this output:

aeiou áéíóú
aeiou áéíóú

How do I fix this odd behaviour? I need to be able to print unicode strings (coming in UTF-8).