diff --git a/Tools/AP_Bootloader/support.cpp b/Tools/AP_Bootloader/support.cpp
index ddf1041da4..c9f37b2b60 100644
--- a/Tools/AP_Bootloader/support.cpp
+++ b/Tools/AP_Bootloader/support.cpp
@@ -22,6 +22,10 @@
 // optional uprintf() code for debug
 // #define BOOTLOADER_DEBUG SD1
 
+#ifndef AP_BOOTLOADER_ALWAYS_ERASE
+#define AP_BOOTLOADER_ALWAYS_ERASE 0
+#endif
+
 #if defined(BOOTLOADER_DEV_LIST)
 static BaseChannel *uarts[] = { BOOTLOADER_DEV_LIST };
 #if HAL_USE_SERIAL == TRUE
@@ -34,10 +38,6 @@ static uint8_t last_uart;
 #define BOOTLOADER_BAUDRATE 115200
 #endif
 
-#ifndef AP_BOOTLOADER_ALWAYS_ERASE
-#define AP_BOOTLOADER_ALWAYS_ERASE 0
-#endif
-
 // #pragma GCC optimize("O0")
 
 static bool cin_data(uint8_t *data, uint8_t len, unsigned timeout_ms)