diff --git a/include/superfemto.h b/include/superfemto.h
index cd74a6e..de9e2c3 100644
--- a/include/superfemto.h
+++ b/include/superfemto.h
@@ -13,7 +13,7 @@
 #include "gsml1const.h"
 
 #define SUPERFEMTO_API(x,y,z)    ((x << 16) | (y << 8) | z)
-#define SUPERFEMTO_API_VERSION   SUPERFEMTO_API(2,1,0)
+#define SUPERFEMTO_API_VERSION   SUPERFEMTO_API(2,2,0)
 
 /****************************************************************************
  *                                   Const                                  *
@@ -173,6 +173,9 @@ typedef struct SuperFemto_ActivateRfReq
     {
         int iClkCor;                    ///< Clock correction value in PPB.
         SuperFemto_ClkSrcId_t clkSrc;   ///< Clock source (0:None, 1:OCXO, 2:TCXO, 3:External, 4:GPS PPS, 5:reserved, 6:RX, 7:Edge)
+    
+        float fMaxTxPower;              ///< Nominal maximum TX power in dBm
+        uint8_t u8UseExtAtten;          ///< Use the external attenuator to control TX power (0:No, 1:Yes)
     } rfTrx;
     
     // RX RF clock options