diff --git a/include/superfemto.h b/include/superfemto.h
index 933c248..867c1cd 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(0,1,0)
+#define SUPERFEMTO_API_VERSION   SUPERFEMTO_API(0,2,0)
 
 /****************************************************************************
  *                                   Const                                  *
@@ -119,6 +119,12 @@ typedef struct SuperFemto_SystemFailureInd
  ***************************************************************************/
 typedef struct SuperFemto_ActivateRfReq
 {
+    // Timing source (FN/TN)
+    struct
+    {
+        uint8_t u8TimSrc;               ///< Timing source (0:Slave/Get timing from remote master BTS, 1:Master/Generates its own timing)
+    } timing;
+    
     // Message queue options
     struct {
         uint8_t u8UseTchMsgq;           ///< Set to '1' to use a separate MSGQUEUE for TCH primitives