diff --git a/sys/mips/mips/in_cksum.c b/sys/mips/mips/in_cksum.c
index 8b4fb94fb56..f0c95d9064b 100644
--- a/sys/mips/mips/in_cksum.c
+++ b/sys/mips/mips/in_cksum.c
@@ -69,7 +69,7 @@ __FBSDID("$FreeBSD$");
     }
 
 static const u_int32_t in_masks[] = {
-#ifndef _MISEB
+#if _BYTE_ORDER == _LITTLE_ENDIAN
 	/*0 bytes*/ /*1 byte*/	/*2 bytes*/ /*3 bytes*/
 	0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF,	/* offset 0 */
 	0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00,	/* offset 1 */