diff --git a/bootloader/drivers/flash/flash.h b/bootloader/drivers/flash/flash.h
index 373d06f..ac6f1b5 100644
--- a/bootloader/drivers/flash/flash.h
+++ b/bootloader/drivers/flash/flash.h
@@ -25,7 +25,7 @@
 /*
  * Driver configuration.
  */
-#define FLASH_4BYTE_ADDRESSING  1
+#define FLASH_4BYTE_ADDRESSING  0
 #define FLASH_FAST_READ         1
 
 /*