diff --git a/sys/sys/socket.h b/sys/sys/socket.h
index 0e32c247347b..fd772f56b76b 100644
--- a/sys/sys/socket.h
+++ b/sys/sys/socket.h
@@ -87,12 +87,12 @@ typedef	_BSD_SOCKLEN_T_	socklen_t;
 /*
  * Additional options, not kept in so_options.
  */
-#define SO_SNDBUF	0x1001		/* send buffer size */
-#define SO_RCVBUF	0x1002		/* receive buffer size */
-#define SO_SNDLOWAT	0x1003		/* send low-water mark */
-#define SO_RCVLOWAT	0x1004		/* receive low-water mark */
-#define SO_SNDTIMEO	0x1005		/* send timeout */
-#define SO_RCVTIMEO	0x1006		/* receive timeout */
+#define	SO_SNDBUF	0x1001		/* send buffer size */
+#define	SO_RCVBUF	0x1002		/* receive buffer size */
+#define	SO_SNDLOWAT	0x1003		/* send low-water mark */
+#define	SO_RCVLOWAT	0x1004		/* receive low-water mark */
+#define	SO_SNDTIMEO	0x1005		/* send timeout */
+#define	SO_RCVTIMEO	0x1006		/* receive timeout */
 #define	SO_ERROR	0x1007		/* get error status and clear */
 #define	SO_TYPE		0x1008		/* get socket type */