diff --git a/libm/man/scalbn.3 b/libm/man/scalbn.3
new file mode 100644
index 0000000..923caab
--- /dev/null
+++ b/libm/man/scalbn.3
@@ -0,0 +1,95 @@
+.\" Copyright (c) 1985, 1991 Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     from: @(#)ieee.3	6.4 (Berkeley) 5/6/91
+.\" $FreeBSD: src/lib/msun/man/scalbn.3,v 1.3 2005/11/24 09:25:10 joel Exp $
+.\"
+.Dd March 4, 2005
+.Dt SCALBN 3
+.Os
+.Sh NAME
+.Nm scalbln ,
+.Nm scalblnf ,
+.Nm scalblnl ,
+.Nm scalbn ,
+.Nm scalbnf ,
+.Nm scalbnl
+.Nd adjust exponent
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn scalbln "double x" "long n"
+.Ft float
+.Fn scalblnf "float x" "long n"
+.Ft long double
+.Fn scalblnl "long double x" "long n"
+.Ft double
+.Fn scalbn "double x" "int n"
+.Ft float
+.Fn scalbnf "float x" "int n"
+.Ft long double
+.Fn scalbnl "long double x" "int n"
+.Sh DESCRIPTION
+These routines return
+.Fa x Ns \(**(2** Ns Fa n )
+computed by exponent manipulation.
+.Sh SEE ALSO
+.Xr ieee 3 ,
+.Xr math 3
+.Sh STANDARDS
+These routines conform to
+.St -isoC-99 ,
+and they implement the Scalb function recommended by
+.St -ieee754 .
+.Sh HISTORY
+The
+.Fn scalbn
+and
+.Fn scalbnf
+functions appeared in
+.Bx 4.3
+and
+.Fx 2.0 ,
+respectively.
+The
+.Fn scalbln
+and
+.Fn scalblnf
+functions first appeared in
+.Fx 5.3 ,
+and
+.Fn scalblnl
+and
+.Fn scalbln
+in
+.Fx 6.0 .