diff --git a/src/LoRa.h b/src/LoRa.h
index bf5fb06..a7ec8ff 100644
--- a/src/LoRa.h
+++ b/src/LoRa.h
@@ -85,7 +85,7 @@ private:
   int _ss;
   int _reset;
   int _dio0;
-  int _frequency;
+  long _frequency;
   int _packetIndex;
   int _implicitHeaderMode;
   void (*_onReceive)(int);