diff --git a/src/main/target/ALIENFLIGHTF4/target.h b/src/main/target/ALIENFLIGHTF4/target.h
index 5c5e7795ff..98387ee23c 100644
--- a/src/main/target/ALIENFLIGHTF4/target.h
+++ b/src/main/target/ALIENFLIGHTF4/target.h
@@ -170,6 +170,7 @@
 #define DEFAULT_FEATURES        (FEATURE_MOTOR_STOP | FEATURE_BLACKBOX)
 #define DEFAULT_RX_FEATURE      FEATURE_RX_SERIAL
 #define SERIALRX_PROVIDER       SERIALRX_SPEKTRUM2048
+#define SERIALRX_UART           SERIAL_PORT_USART3
 
 #define USE_SERIAL_4WAY_BLHELI_INTERFACE