diff --git a/drivers/ieee802154/ieee802154_nrf5.c b/drivers/ieee802154/ieee802154_nrf5.c
index f49b694f4e..6c2bd653b8 100644
--- a/drivers/ieee802154/ieee802154_nrf5.c
+++ b/drivers/ieee802154/ieee802154_nrf5.c
@@ -989,7 +989,8 @@ void nrf_802154_received_timestamp_raw(uint8_t *data, int8_t power, uint8_t lqi,
 		nrf5_data.rx_frames[i].lqi = lqi;
 
 #if defined(CONFIG_NET_PKT_TIMESTAMP)
-		nrf5_data.rx_frames[i].time = nrf_802154_mhr_timestamp_get(time, data[0]);
+		nrf5_data.rx_frames[i].time =
+			nrf_802154_timestamp_end_to_phr_convert(time, data[0]);
 #endif
 
 		if (data[ACK_REQUEST_BYTE] & ACK_REQUEST_BIT) {
@@ -1084,9 +1085,8 @@ void nrf_802154_transmitted_raw(uint8_t *frame,
 		nrf5_data.ack_frame.lqi = metadata->data.transmitted.lqi;
 
 #if defined(CONFIG_NET_PKT_TIMESTAMP)
-		nrf5_data.ack_frame.time =
-			nrf_802154_mhr_timestamp_get(
-				metadata->data.transmitted.time, nrf5_data.ack_frame.psdu[0]);
+		nrf5_data.ack_frame.time = nrf_802154_timestamp_end_to_phr_convert(
+			metadata->data.transmitted.time, nrf5_data.ack_frame.psdu[0]);
 #endif
 	}
 
diff --git a/modules/openthread/platform/radio.c b/modules/openthread/platform/radio.c
index 6fd9bf737c..c96c3c31ad 100644
--- a/modules/openthread/platform/radio.c
+++ b/modules/openthread/platform/radio.c
@@ -41,7 +41,6 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME, CONFIG_OPENTHREAD_L2_LOG_LEVEL);
 #define SHORT_ADDRESS_SIZE 2
 
 #define FCS_SIZE     2
-#define PHR_DURATION 32
 #if defined(CONFIG_OPENTHREAD_THREAD_VERSION_1_1)
 #define ACK_PKT_LENGTH 5
 #else
@@ -189,7 +188,7 @@ enum net_verdict ieee802154_handle_ack(struct net_if *iface, struct net_pkt *pkt
 
 	/* OpenThread expects the timestamp to point to the end of SFD */
 	ack_frame.mInfo.mRxInfo.mTimestamp = pkt_time->second * USEC_PER_SEC +
-					     pkt_time->nanosecond / NSEC_PER_USEC - PHR_DURATION;
+					     pkt_time->nanosecond / NSEC_PER_USEC;
 #endif
 
 	return NET_OK;
@@ -480,8 +479,8 @@ static void openthread_handle_received_frame(otInstance *instance,
 	struct net_ptp_time *pkt_time = net_pkt_timestamp(pkt);
 
 	/* OpenThread expects the timestamp to point to the end of SFD */
-	recv_frame.mInfo.mRxInfo.mTimestamp = pkt_time->second * USEC_PER_SEC +
-					      pkt_time->nanosecond / NSEC_PER_USEC - PHR_DURATION;
+	recv_frame.mInfo.mRxInfo.mTimestamp =
+		pkt_time->second * USEC_PER_SEC + pkt_time->nanosecond / NSEC_PER_USEC;
 #endif
 
 	if (net_pkt_ieee802154_arb(pkt) && net_pkt_ieee802154_fv2015(pkt)) {