diff --git a/stm8s.h b/stm8s.h
index 99d0d50..41435e1 100644
--- a/stm8s.h
+++ b/stm8s.h
@@ -325,8 +325,8 @@ typedef struct {
 #define FLASH_PUKR_KEY1 0x56
 #define FLASH_PUKR_KEY2 0xAE
 #define FLASH_DUKR (*(volatile uint8_t *)(FLASH_BASE + 0x0A))
-#define FLASH_DUKR_KEY1 0x56
-#define FLASH_DUKR_KEY2 0xAE
+#define FLASH_DUKR_KEY1 0xAE
+#define FLASH_DUKR_KEY2 0x56
 
 // Block: ITC