diff --git a/include/libopencm3/stm32/common/flash_common_l01.h b/include/libopencm3/stm32/common/flash_common_l01.h
index 39a031cd..8333df57 100644
--- a/include/libopencm3/stm32/common/flash_common_l01.h
+++ b/include/libopencm3/stm32/common/flash_common_l01.h
@@ -84,8 +84,8 @@
 #define FLASH_PRGKEYR_PRGKEY2		((uint32_t)0x13141516)
 
 /* Option byte key register (FLASH_OPTKEYR) */
-#define FLASH_OPTKEYR_OPTKEY1		((uint32_t)0xFBEAD9C8)
-#define FLASH_OPTKEYR_OPTKEY2		((uint32_t)0x24252627)
+#define FLASH_OPTKEYR_KEY1		((uint32_t)0xFBEAD9C8)
+#define FLASH_OPTKEYR_KEY2		((uint32_t)0x24252627)
 
 /* --- FLASH_SR values ----------------------------------------------------- */
 #define FLASH_SR_OPTVERR		(1 << 11)
diff --git a/lib/stm32/common/flash_common_l01.c b/lib/stm32/common/flash_common_l01.c
index 86ec743a..7ca1f48d 100644
--- a/lib/stm32/common/flash_common_l01.c
+++ b/lib/stm32/common/flash_common_l01.c
@@ -72,8 +72,8 @@ void flash_lock_progmem(void)
  */
 void flash_unlock_option_bytes(void)
 {
-	FLASH_OPTKEYR = FLASH_OPTKEYR_OPTKEY1;
-	FLASH_OPTKEYR = FLASH_OPTKEYR_OPTKEY2;
+	FLASH_OPTKEYR = FLASH_OPTKEYR_KEY1;
+	FLASH_OPTKEYR = FLASH_OPTKEYR_KEY2;
 }
 
 void flash_lock_option_bytes(void)