diff --git a/libraries/AP_Relay/AP_Relay.cpp b/libraries/AP_Relay/AP_Relay.cpp
index 1b6f177a5e..a077ac7f77 100644
--- a/libraries/AP_Relay/AP_Relay.cpp
+++ b/libraries/AP_Relay/AP_Relay.cpp
@@ -10,10 +10,7 @@
 #include <AP_HAL/AP_HAL.h>
 #include "AP_Relay.h"
 
-#if CONFIG_HAL_BOARD == HAL_BOARD_APM1
-#define RELAY1_PIN_DEFAULT 47
-#define RELAY2_PIN_DEFAULT -1
-#elif CONFIG_HAL_BOARD == HAL_BOARD_APM2 || CONFIG_HAL_BOARD == HAL_BOARD_SITL
+#if CONFIG_HAL_BOARD == HAL_BOARD_SITL
 #define RELAY1_PIN_DEFAULT 13
 #define RELAY2_PIN_DEFAULT -1
 #elif CONFIG_HAL_BOARD == HAL_BOARD_PX4