diff --git a/nanostack/platform/arm_hal_phy.h b/nanostack/platform/arm_hal_phy.h
index 96ea55016f84..ab53b5942cb0 100644
--- a/nanostack/platform/arm_hal_phy.h
+++ b/nanostack/platform/arm_hal_phy.h
@@ -195,6 +195,8 @@ typedef struct phy_rf_statistics_s {
     uint32_t rx_timeouts;      ///< reception timeouts
     uint64_t tx_active_time;   ///< transmission active time
     uint64_t rx_active_time;   ///< reception active time
+    uint32_t tx_bytes;         ///< transmitted bytes
+    uint32_t rx_bytes;         ///< received bytes
 } phy_rf_statistics_s;
 
 /** Virtual data request */