diff --git a/bsp/lpc2478/startup.c b/bsp/lpc2478/startup.c
index cde4d4552a..642d90f66a 100644
--- a/bsp/lpc2478/startup.c
+++ b/bsp/lpc2478/startup.c
@@ -94,15 +94,13 @@ void rtthread_startup(void)
 	
 	/* never reach here */
 	return ;
-}
-
+}
+
 #ifdef __CC_ARM
 int main(void)
-{
-	rt_uint32_t UNUSED level;
-
+{
 	/* disable interrupt first */
-	level = rt_hw_interrupt_disable();
+	rt_hw_interrupt_disable();
 
 	/* invoke rtthread_startup */
 	rtthread_startup();