The invention relates to an apparatus including: at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: choose a modulation, coding and rank scheme; determine a channel quality indicator based on the modulation, coding and rank scheme, and add a detector class indicator to the channel quality indicator for informing capability to a high order modulation if the high order modulation is chosen. In one particular embodiment the high order modulation is 64-QAM and excludes QPSK and 16-QAM, and the added detector class indictor can be a single bit.