diff --git a/nanostack/platform/arm_hal_phy.h b/nanostack/platform/arm_hal_phy.h
index 879003bc618..8a332beb6bf 100644
--- a/nanostack/platform/arm_hal_phy.h
+++ b/nanostack/platform/arm_hal_phy.h
@@ -56,6 +56,8 @@ typedef enum {
     PHY_EXTENSION_READ_LINK_STATUS, /**< Net library could read link status. */
     PHY_EXTENSION_CONVERT_SIGNAL_INFO, /**< Convert signal info. */
     PHY_EXTENSION_ACCEPT_ANY_BEACON, /**< Set boolean true or false for accept beacon from other Pan-ID than configured. Default value should be false */
+    PHY_EXTENSION_SET_TX_TIME,  /**< Net library sets transmission time based on global time stamp. */
+    PHY_EXTENSION_READ_RX_TIME, /**< Read the time of last reception based on global time stamp. */
 } phy_extension_type_e;
 
 /** Address types */