diff --git a/LEGAL b/LEGAL
index 96cc4fdb39..7a7e825510 100644
--- a/LEGAL
+++ b/LEGAL
@@ -260,6 +260,17 @@ missing/strlcpy.c
    OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
    ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+missing/langinfo.c
+
+  This file is from http://www.cl.cam.ac.uk/~mgk25/ucs/langinfo.c.
+  Ruby uses a modified version. The file contains the following
+  author/copyright notice:
+
+  Markus.Kuhn@cl.cam.ac.uk -- 2002-03-11
+  Permission to use, copy, modify, and distribute this software
+  for any purpose and without fee is hereby granted. The author
+  disclaims all warranties with regard to this software.
+
 ext/digest/md5/md5.[ch]:
 
   These files are under the following license.  Ruby uses modified