diff --git a/Tools/AP_Bootloader/AP_Bootloader.cpp b/Tools/AP_Bootloader/AP_Bootloader.cpp
index 5adc4560e8..ca9fce8cba 100644
--- a/Tools/AP_Bootloader/AP_Bootloader.cpp
+++ b/Tools/AP_Bootloader/AP_Bootloader.cpp
@@ -77,7 +77,7 @@ int main(void)
     AFIO->MAPR = mapr | AFIO_MAPR_CAN_REMAP_REMAP2 | AFIO_MAPR_SPI3_REMAP;
 #endif
 
-#ifdef HAL_FLASH_PROTECTION
+#if HAL_FLASH_PROTECTION
     stm32_flash_unprotect_flash();
 #endif