diff --git a/src/LMIC-node.cpp b/src/LMIC-node.cpp
index 93d04c0..2b179a2 100644
--- a/src/LMIC-node.cpp
+++ b/src/LMIC-node.cpp
@@ -520,10 +520,20 @@ void initLmic(bit_t adrEnabled = 1,
             serial.println(")");            
         #endif
     #endif
+
+    #ifdef MCCI_LMIC
+        // Register a custom eventhandler and don't use default onEvent() to enable
+        // additional features (e.g. make EV_RXSTART available). User data pointer is omitted.
+        LMIC_registerEventCb(&onLmicEvent, nullptr);
+    #endif
 }
 
 
+#ifdef MCCI_LMIC 
+void onLmicEvent(void *pUserData, ev_t ev)
+#else
 void onEvent(ev_t ev) 
+#endif
 {
     // LMIC event handler
     ostime_t timestamp = os_getTime(); 
diff --git a/src/LMIC-node.h b/src/LMIC-node.h
index 5840a57..a6eeeac 100644
--- a/src/LMIC-node.h
+++ b/src/LMIC-node.h
@@ -46,6 +46,7 @@ enum class PrintTarget { All, Serial, Display };
 // Forward declarations
 void processWork(ostime_t timestamp);
 void processDownlink(ostime_t eventTimestamp, uint8_t fPort, uint8_t* data, uint8_t dataLength);
+void onLmicEvent(void *pUserData, ev_t ev);
 void displayTxSymbol(bool visible);
 
 #ifndef DO_WORK_INTERVAL_SECONDS            // Should be set in platformio.ini