<p>Multiple access control (MAC) protocols facilitate wireless devices to access a shared radio channel. Slotted ALOHA is a MAC protocol extensively used in wireless networks, owing to its manifold advantages. Age of information (AoI) emerges as a crucial performance metric, quantifying the freshness of data in a monitor network by measuring the time elapsed since the last data is generated. In the Internet of Things (IoT), maintaining a low Average AoI (AAoI) across the network is critical for ensuring timely status updates. Threshold ALOHA (TA), developed from slotted ALOHA, emerges as a solution, in which devices transmit data to a base station with a permission probability only when the information age exceeds or is equal to a predetermined threshold. That is, in TA, those devices whose ages are no less than the threshold have higher transmission probability than those lower than the threshold. However, TA does not consider packet transmission errors that are inevitable in wireless networks. When packet errors are included, the threshold and transmission probability should be re-selected to achieve better AAoI. Therefore, this paper studies a modified TA, called Packet Error-Aware Threshold ALOHA (PEATA), in which a device employs a pair of threshold and transmission probability that includes a packet error probability to generate and send data. This paper develops analysis and conducts simulations to study the performances of PEATA in error-prone wireless networks. The results show that PEATA significantly improves AAoI compared to TA, while also consuming less energy.</p>