diff --git a/Power_Pico/Core/Src/main.c b/Power_Pico/Core/Src/main.c
index 8912c73..d405cd2 100644
--- a/Power_Pico/Core/Src/main.c
+++ b/Power_Pico/Core/Src/main.c
@@ -75,7 +75,7 @@ int main(void)
 
   /* USER CODE BEGIN 1 */
   //this must set same as keil setting
-  SCB->VTOR = FLASH_BASE + 0x00000000;
+  SCB->VTOR = FLASH_BASE + 0x00000000U;
   /* USER CODE END 1 */
 
   /* MCU Configuration--------------------------------------------------------*/