Systems, methods, and apparatuses for aggregating multi-user media access control protocol data units (MPDU) frame in a wireless network are provided. One aspect of this disclosure provides a method of wireless communication. The method includes generating, by an apparatus, an aggregated media access control protocol data unit (A-MPDU) frame comprising a plurality of media access control protocol data unit (MPDU) frames. A first MPDU frame of the plurality of MPDU frames is intended for at least a first device of a first type and a second MPDU frame of the plurality of MPDU frames is intended for at least a second device of a second type. The method further comprises inserting a value that is not defined for the second device into a media access control (MAC) header field of the first MPDU frame intended for the first device or the second MPDU frame intended for the second device.