diff --git a/libraries/AP_BoardConfig/AP_BoardConfig.h b/libraries/AP_BoardConfig/AP_BoardConfig.h
index 8f63fe3d61..ae255935d0 100644
--- a/libraries/AP_BoardConfig/AP_BoardConfig.h
+++ b/libraries/AP_BoardConfig/AP_BoardConfig.h
@@ -18,10 +18,6 @@
 #define AP_FEATURE_RTSCTS 0
 #endif
 
-#ifndef AP_FEATURE_RTSCTS
-#define AP_FEATURE_RTSCTS 0
-#endif
-
 #ifndef AP_FEATURE_SBUS_OUT
 #define AP_FEATURE_SBUS_OUT 0
 #endif