2 files changed, 4 insertions, 4 deletions

diff --git a/lib/libc/string/swab.3 b/lib/libc/string/swab.3
index 4d27e17d5b3f..93d879d2a35f 100644
--- a/lib/libc/string/swab.3
+++ b/lib/libc/string/swab.3
@@ -41,9 +41,9 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In string.h
+.In unistd.h
 .Ft void
-.Fn swab "const void * restrict src" "void * restrict dst" "size_t len"
+.Fn swab "const void * restrict src" "void * restrict dst" "ssize_t len"
 .Sh DESCRIPTION
 The function
 .Fn swab
diff --git a/lib/libc/string/swab.c b/lib/libc/string/swab.c
index aa6f2682c01b..8c0c43febfde 100644
--- a/lib/libc/string/swab.c
+++ b/lib/libc/string/swab.c
@@ -40,10 +40,10 @@ static char sccsid[] = "@(#)swab.c	8.1 (Berkeley) 6/4/93";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include <string.h>
+#include <unistd.h>
 
 void
-swab(const void * __restrict from, void * __restrict to, size_t len)
+swab(const void * __restrict from, void * __restrict to, ssize_t len)
 {
 	unsigned long temp;
 	int n;