diff --git a/sys/boot/pc98/boot2/boot2.c b/sys/boot/pc98/boot2/boot2.c
index e35b42536c2..54082ad207f 100644
--- a/sys/boot/pc98/boot2/boot2.c
+++ b/sys/boot/pc98/boot2/boot2.c
@@ -187,9 +187,8 @@ xfsread(ino_t inode, void *buf, size_t nbyte)
 static inline uint32_t
 memsize(void)
 {
-    u_char *p = (u_char *)PTOV(0x401);
-
-    return *p * 128 * 1024 + *(u_int16_t *)(p + (0x594 - 0x401)) * 1024 * 1024;
+    return (*(u_char *)PTOV(0x401) * 128 * 1024 +
+	*(uint16_t *)PTOV(0x594) * 1024 * 1024);
 }
 
 static inline void