diff --git a/configs/BOTWINGF405/config.h b/configs/BOTWINGF405/config.h
index e61ab76c..3daae90d 100644
--- a/configs/BOTWINGF405/config.h
+++ b/configs/BOTWINGF405/config.h
@@ -61,6 +61,7 @@
 
 #define UART1_TX_PIN                        PB6
 #define UART1_RX_PIN                        PB7
+#define RX_PPM_PIN                           PB7
 
 #define UART2_TX_PIN                        PA2
 #define UART2_RX_PIN                        PA3