diff --git a/src/stm32/Kconfig b/src/stm32/Kconfig
index 814858eb..646eb8bc 100644
--- a/src/stm32/Kconfig
+++ b/src/stm32/Kconfig
@@ -128,6 +128,8 @@ choice
         bool "28KiB bootloader" if MACH_STM32F103
     config STM32_FLASH_START_8800
         bool "34KiB bootloader (Chitu v6 Bootloader)" if MACH_STM32F103
+    config STM32_FLASH_START_C000
+        bool "48KiB bootloader (MKS Robin Nano V3)" if MACH_STM32F407
     config STM32_FLASH_START_10000
         bool "64KiB bootloader (Alfawise)" if MACH_STM32F103
     config STM32_FLASH_START_800
@@ -150,6 +152,7 @@ config FLASH_START
     default 0x8007000 if STM32_FLASH_START_7000
     default 0x8008000 if STM32_FLASH_START_8000
     default 0x8008800 if STM32_FLASH_START_8800
+    default 0x800C000 if STM32_FLASH_START_C000
     default 0x8010000 if STM32_FLASH_START_10000
     default 0x8000000