diff --git a/boards/holybro/kakutef7/src/board_config.h b/boards/holybro/kakutef7/src/board_config.h
index 9254c57c52..44e1628b10 100644
--- a/boards/holybro/kakutef7/src/board_config.h
+++ b/boards/holybro/kakutef7/src/board_config.h
@@ -113,6 +113,7 @@
 /* RC Serial port */
 
 #define RC_SERIAL_PORT                     "/dev/ttyS4"
+#define RC_SERIAL_SINGLEWIRE
 
 #define GPIO_RSSI_IN                       /* PC5  */ (GPIO_INPUT|GPIO_PULLUP|GPIO_PORTC|GPIO_PIN5)