A method of wireless communication at a wireless receiver (104, 402, 102, 404, 902, 1002), comprising: determining (412, 702, 802) that a transmission of a first transport block, TB, based on a first redundancy version is not received from a wireless transmitter (104, 402, 102, 404, 902, 1002); and transmitting (416, 704, 808), to the wireless transmitter (104, 402, 102, 404, 902, 1002), a hybrid automatic repeat request, HARQ, acknowledgement, ACK, to terminate one or more HARQ retransmissions associated with one or more different redundancy versions of the first TB, wherein the wireless receiver (104, 402, 102, 404, 902, 1002) transmits the ACK to terminate the one or more HARQ retransmissions based on: the one or more HARQ retransmissions indicate a reserved modulation and coding scheme, MCS, of a lost HARQ transmission where the MCS is indicated; or a determination that a number of systematic bits were lost from a HARQ transmission, the number being greater than a threshold; or a coding rate associated with a HARQ transmission being greater than a threshold, wherein a lower coding rate corresponds to more redundancy bits in a channel coding process and a higher coding rate corresponds to less redundancy bits in the channel coding process; or a number of HARQ processes associated with the one or more HARQ retransmissions being greater than a threshold. determining (412, 702, 802) that a transmission of a first transport block, TB, based on a first redundancy version is not received from a wireless transmitter (104, 402, 102, 404, 902, 1002); and transmitting (416, 704, 808), to the wireless transmitter (104, 402, 102, 404, 902, 1002), a hybrid automatic repeat request, HARQ, acknowledgement, ACK, to terminate one or more HARQ retransmissions associated with one or more different redundancy versions of the first TB, wherein the wireless receiver (104, 402, 102, 404, 902, 1002) transmits the ACK to terminate the one or more HARQ retransmissions based on: the one or more HARQ retransmissions indicate a reserved modulation and coding scheme, MCS, of a lost HARQ transmission where the MCS is indicated; or a determination that a number of systematic bits were lost from a HARQ transmission, the number being greater than a threshold; or a coding rate associated with a HARQ transmission being greater than a threshold, wherein a lower coding rate corresponds to more redundancy bits in a channel coding process and a higher coding rate corresponds to less redundancy bits in the channel coding process; or a number of HARQ processes associated with the one or more HARQ retransmissions being greater than a threshold. the one or more HARQ retransmissions indicate a reserved modulation and coding scheme, MCS, of a lost HARQ transmission where the MCS is indicated; or a determination that a number of systematic bits were lost from a HARQ transmission, the number being greater than a threshold; or a coding rate associated with a HARQ transmission being greater than a threshold, wherein a lower coding rate corresponds to more redundancy bits in a channel coding process and a higher coding rate corresponds to less redundancy bits in the channel coding process; or a number of HARQ processes associated with the one or more HARQ retransmissions being greater than a threshold.