--- Libc/Libc-262/string/swab.3
+++ Libc/Libc-498/string/swab.3
@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)swab.3	8.1 (Berkeley) 6/4/93
-.\" $FreeBSD: src/lib/libc/string/swab.3,v 1.6 2001/10/01 16:09:00 ru Exp $
+.\" $FreeBSD: src/lib/libc/string/swab.3,v 1.7 2002/08/30 21:18:39 robert Exp $
 .\"
 .Dd June 4, 1993
 .Dt SWAB 3
@@ -41,26 +41,48 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In string.h
+.In unistd.h
 .Ft void
-.Fn swab "const void *src" "void *dst" "size_t len"
+.Fo swab
+.Fa "const void *restrict src"
+.Fa "void *restrict dest"
+.Fa "ssize_t nbytes"
+.Fc
 .Sh DESCRIPTION
 The function
 .Fn swab
 copies
-.Fa len
+.Fa nbytes
 bytes from the location referenced by
 .Fa src
 to the location referenced by
-.Fa dst ,
+.Fa dest ,
 swapping adjacent bytes.
 .Pp
 The argument
-.Fa len
+.Fa nbytes
 must be an even number.
+.Sh LEGACY SYNOPSIS
+.Fd #include <string.h>
+.Pp
+.Ft void
+.br
+.Fo swab
+.Fa "const void *restrict src"
+.Fa "void *restrict dest"
+.Fa "size_t nbytes"
+.Fc ;
+.Pp
+The include file
+.In string.h
+is necessary for this function.
+The type of
+.Fa nbytes
+has changed.
 .Sh SEE ALSO
 .Xr bzero 3 ,
-.Xr memset 3
+.Xr memset 3 ,
+.Xr compat 5
 .Sh HISTORY
 A
 .Fn swab