diff --git a/nimble/controller/src/ble_ll_scan_aux.c b/nimble/controller/src/ble_ll_scan_aux.c
index 56f1c528e..ed69055b1 100644
--- a/nimble/controller/src/ble_ll_scan_aux.c
+++ b/nimble/controller/src/ble_ll_scan_aux.c
@@ -756,7 +756,7 @@ ble_ll_scan_aux_sched(struct ble_ll_scan_aux_data *aux, uint32_t pdu_time,
         return -1;
     }
 
-    max_aux_time_us = ble_ll_pdu_tx_time_get(BLE_LL_MAX_PAYLOAD_LEN,
+    max_aux_time_us = ble_ll_pdu_tx_time_get(MYNEWT_VAL(BLE_LL_SCHED_SCAN_AUX_PDU_LEN),
                                              ble_ll_phy_to_phy_mode(aux->sec_phy, 0));
 
     rc = ble_ll_sched_scan_aux(&aux->sch, pdu_time, pdu_time_rem, offset_us,