diff --git a/libraries/AP_RSSI/AP_RSSI.cpp b/libraries/AP_RSSI/AP_RSSI.cpp
index af0536d91d..6b7607ffa0 100644
--- a/libraries/AP_RSSI/AP_RSSI.cpp
+++ b/libraries/AP_RSSI/AP_RSSI.cpp
@@ -26,7 +26,7 @@ extern const AP_HAL::HAL& hal;
 #endif
 
 #ifndef BOARD_RSSI_ANA_PIN
-#define BOARD_RSSI_ANA_PIN 0
+#define BOARD_RSSI_ANA_PIN -1
 #endif
 
 #ifndef BOARD_RSSI_ANA_PIN_HIGH