diff --git a/ArduSub/system.cpp b/ArduSub/system.cpp
index eb1fbd6df5..1d9333b61e 100644
--- a/ArduSub/system.cpp
+++ b/ArduSub/system.cpp
@@ -35,7 +35,7 @@ void Sub::init_ardupilot()
     BoardConfig_CAN.init();
 #endif
 
-#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
+#if AP_FEATURE_BOARD_DETECT
     // Detection won't work until after BoardConfig.init()
     switch (AP_BoardConfig::get_board_type()) {
     case AP_BoardConfig::PX4_BOARD_PIXHAWK2: