diff --git a/configs/MAMBAF411/config.h b/configs/MAMBAF411/config.h
index 9b762f47..8cfd7ffd 100644
--- a/configs/MAMBAF411/config.h
+++ b/configs/MAMBAF411/config.h
@@ -88,6 +88,6 @@
 
 #define ADC1_DMA_OPT        1
 
-
+#define SERIALRX_UART SERIAL_PORT_USART1
 #define DEFAULT_DSHOT_BURST DSHOT_DMAR_AUTO
 #define DEFAULT_DSHOT_BITBANG DSHOT_BITBANG_OFF