diff --git a/04_day/bootpack.c b/04_day/bootpack.c
index 4098857..2f84453 100644
--- a/04_day/bootpack.c
+++ b/04_day/bootpack.c
@@ -8,7 +8,7 @@ void HariMain(void)
 	p = (char *) 0xa0000; /* 地址变量赋值 */
 
 	for (i = 0; i <= 0xffff; i++) {
-		*(p + i) = i & 0x0f;
+		p[i] = i & 0x0f;
 	}
 
 	for (;;) {