diff --git a/drivers/netdev_ieee802154_submac/Makefile.dep b/drivers/netdev_ieee802154_submac/Makefile.dep
index ded8dc4552..07827af196 100644
--- a/drivers/netdev_ieee802154_submac/Makefile.dep
+++ b/drivers/netdev_ieee802154_submac/Makefile.dep
@@ -2,4 +2,5 @@ USEMODULE += netdev_ieee802154
 USEMODULE += netdev_new_api
 USEMODULE += ieee802154
 USEMODULE += ieee802154_submac
+USEMODULE += iolist
 USEMODULE += ztimer_usec
diff --git a/drivers/netdev_ieee802154_submac/netdev_ieee802154_submac.c b/drivers/netdev_ieee802154_submac/netdev_ieee802154_submac.c
index 32bc07cc64..0205f605f6 100644
--- a/drivers/netdev_ieee802154_submac/netdev_ieee802154_submac.c
+++ b/drivers/netdev_ieee802154_submac/netdev_ieee802154_submac.c
@@ -196,7 +196,14 @@ static int _send(netdev_t *netdev, const iolist_t *pkt)
          * inside the TX Done callback */
         netdev_submac->ev = NETDEV_EVENT_TX_STARTED;
     }
-    netdev_submac->bytes_tx = res;
+    if (res == 0) {
+        uint8_t len = iolist_size(pkt);
+        if (len > 0) {
+            len += IEEE802154_FCS_LEN;
+        }
+        netdev_submac->bytes_tx = len;
+    }
+
     return res;
 }
 
diff --git a/pkg/openthread/contrib/platform_radio.c b/pkg/openthread/contrib/platform_radio.c
index e999d174d7..e671aa14ff 100644
--- a/pkg/openthread/contrib/platform_radio.c
+++ b/pkg/openthread/contrib/platform_radio.c
@@ -189,7 +189,7 @@ void send_pkt(otInstance *aInstance, netdev_t *dev, netdev_event_t event)
     } else if (res == -EHOSTUNREACH) {
         otPlatRadioTxDone(aInstance, &sTransmitFrame, NULL, OT_ERROR_NO_ACK);
     } else {
-        otPlatRadioTxDone(aInstance, &sTransmitFrame, NULL, OT_ERROR_FAILED);
+        otPlatRadioTxDone(aInstance, &sTransmitFrame, NULL, OT_ERROR_ABORT);
     }
 }
 #else