diff --git a/src/main/io/serial_4way.c b/src/main/io/serial_4way.c
index ebdb0d21dd..17200d030c 100644
--- a/src/main/io/serial_4way.c
+++ b/src/main/io/serial_4way.c
@@ -70,7 +70,7 @@
 // *** change to adapt Revision
 #define SERIAL_4WAY_VER_MAIN 20
 #define SERIAL_4WAY_VER_SUB_1 (uint8_t) 0
-#define SERIAL_4WAY_VER_SUB_2 (uint8_t) 00
+#define SERIAL_4WAY_VER_SUB_2 (uint8_t) 01
 
 #define SERIAL_4WAY_PROTOCOL_VER 107
 // *** end