diff --git a/sys/powerpc/powerpc/in_cksum.c b/sys/powerpc/powerpc/in_cksum.c
index ed0881d7520a..906dc7e8d9a3 100644
--- a/sys/powerpc/powerpc/in_cksum.c
+++ b/sys/powerpc/powerpc/in_cksum.c
@@ -42,6 +42,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
+#include <sys/endian.h>
 #include <sys/param.h>
 #include <sys/mbuf.h>
 #include <sys/systm.h>
@@ -73,7 +74,7 @@
     }
 
 static const u_int32_t in_masks[] = {
-#if 0
+#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 */