1 files changed, 3 insertions, 8 deletions

diff --git a/tmk_core/common/avr/bootloader.c b/tmk_core/common/avr/bootloader.c
index 5f9ecc510..ca9746f32 100644
--- a/tmk_core/common/avr/bootloader.c
+++ b/tmk_core/common/avr/bootloader.c
@@ -59,11 +59,6 @@
 uint16_t bootloader_start;
 #endif
 
-#define BOOT_SIZE_256 0b110
-#define BOOT_SIZE_512 0b100
-#define BOOT_SIZE_1024 0b010
-#define BOOT_SIZE_2048 0b000
-
 // compatibility between ATMega8 and ATMega88
 #if !defined(MCUCSR)
 #    if defined(MCUSR)
@@ -86,11 +81,11 @@ void bootloader_jump(void) {
 #if !defined(BOOTLOADER_SIZE)
     uint8_t high_fuse = boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS);
 
-    if (high_fuse & BOOT_SIZE_256) {
+    if (high_fuse & ~(FUSE_BOOTSZ0 & FUSE_BOOTSZ1)) {
         bootloader_start = (FLASH_SIZE - 512) >> 1;
-    } else if (high_fuse & BOOT_SIZE_512) {
+    } else if (high_fuse & ~(FUSE_BOOTSZ1)) {
         bootloader_start = (FLASH_SIZE - 1024) >> 1;
-    } else if (high_fuse & BOOT_SIZE_1024) {
+    } else if (high_fuse & ~(FUSE_BOOTSZ0)) {
         bootloader_start = (FLASH_SIZE - 2048) >> 1;
     } else {
         bootloader_start = (FLASH_SIZE - 4096) >> 1;