diff --git a/Config.h b/Config.h
index 7ab114e..7b9c065 100644
--- a/Config.h
+++ b/Config.h
@@ -28,7 +28,7 @@
 #define ENABLE_ADF7021
 
 // Bidirectional Data pin (Enable Standard TX/RX Data Interface of ADF7021):
-// #define BIDIR_DATA_PIN
+#define BIDIR_DATA_PIN
 
 // TCXO of the ADF7021:
 // For 14.7456 MHz: