diff --git a/cpu/nrf52/include/nrf802154.h b/cpu/nrf52/include/nrf802154.h
index 80bd10aec6..d607ed84f8 100644
--- a/cpu/nrf52/include/nrf802154.h
+++ b/cpu/nrf52/include/nrf802154.h
@@ -98,5 +98,9 @@ int nrf802154_init(void);
  */
 void nrf802154_setup(nrf802154_t *dev);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* NRF802154_H */
 /** @} */
diff --git a/cpu/nrf52/radio/nrf802154/nrf802154_radio.c b/cpu/nrf52/radio/nrf802154/nrf802154_radio.c
index 68240259cc..d957da3e4e 100644
--- a/cpu/nrf52/radio/nrf802154/nrf802154_radio.c
+++ b/cpu/nrf52/radio/nrf802154/nrf802154_radio.c
@@ -171,7 +171,7 @@ static int _write(ieee802154_dev_t *dev, const iolist_t *iolist)
     /* specify the length of the package. */
     txbuf[0] = len + IEEE802154_FCS_LEN;
 
-    return len;
+    return 0;
 }
 
 static int _confirm_transmit(ieee802154_dev_t *dev, ieee802154_tx_info_t *info)