diff --git a/Libraries/Cordio/platform/include/pal_bb_ble.h b/Libraries/Cordio/platform/include/pal_bb_ble.h
index b98883b1c5..0f24e9ffa5 100644
--- a/Libraries/Cordio/platform/include/pal_bb_ble.h
+++ b/Libraries/Cordio/platform/include/pal_bb_ble.h
@@ -341,6 +341,14 @@ void PalBbBleInlineEncryptSetPacketCount(uint64_t count);
 /*************************************************************************************************/
 void PalBbBleLowPower(void);
 
+/*************************************************************************************************/
+/*!
+ *  \brief      Refresh encryption keys.
+ *
+ *  \note       Needed after deep sleep.
+ */
+/*************************************************************************************************/
+void PalBbBleRefreshKeyAfterSleep(void);
 /*! \} */    /* PAL_BB_BLE */
 
 #ifdef __cplusplus