A transmitter comprising an input data buffer to store a plurality of bytes received on a first interconnect; multiplexer circuitry coupled to the input data buffer; and an output buffer coupled to the multiplexer circuitry, a second interconnect, and a third interconnect. The multiplexer circuitry is to: receive byte enable information in the input data buffer; determine that one or more of the plurality of bytes stored in the input data buffer are invalid; store an indicator in the output buffer; store valid bytes of the plurality of bytes in the output buffer to transmit on the third interconnect; and store the byte enable information in the output buffer to transmit on the third interconnect.