diff --git a/LICENSE b/LICENSE
index 785b75b0e5..62ec03c676 100644
--- a/LICENSE
+++ b/LICENSE
@@ -191,10 +191,12 @@ Copyright: 2001-2010 Joachim Buermann
 License: wxWindows
 
 Files: src/mod/endpoints/mod_gsmopen/libctb-0.16/src/win32/getopt.cpp
-Copyright: 2001 ?
-License: clueless and unacceptable
- FIXME -- this cannot go in Debian -- the license is stated as:
-  (I think Open Source)
+Copyright: 1984 Henry Spencer
+License: public-domain
+Comment:
+ https://irreal.org/blog/?p=6240
+ http://esr.ibiblio.org/?p=7552
+ https://sources.debian.org/src/apg/2.2.3.dfsg.1-5/getopt.c/?hl=84#L84
 
 Files: src/mod/endpoints/mod_rtmp/libamf/src/types.[ch]
 Copyright: 2007, 2008 Marc Noirot <marc.noirot AT gmail.com>
diff --git a/debian/copyright b/debian/copyright
index fd4bb8a3f0..c6aaa743df 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -191,10 +191,12 @@ Copyright: 2001-2010 Joachim Buermann
 License: wxWindows
 
 Files: src/mod/endpoints/mod_gsmopen/libctb-0.16/src/win32/getopt.cpp
-Copyright: 2001 ?
-License: clueless and unacceptable
- FIXME -- this cannot go in Debian -- the license is stated as:
-  (I think Open Source)
+Copyright: 1984 Henry Spencer
+License: public-domain
+Comment:
+ https://irreal.org/blog/?p=6240
+ http://esr.ibiblio.org/?p=7552
+ https://sources.debian.org/src/apg/2.2.3.dfsg.1-5/getopt.c/?hl=84#L84
 
 Files: src/mod/endpoints/mod_rtmp/libamf/src/types.[ch]
 Copyright: 2007, 2008 Marc Noirot <marc.noirot AT gmail.com>
diff --git a/src/mod/endpoints/mod_gsmopen/libctb-0.16/src/win32/getopt.cpp b/src/mod/endpoints/mod_gsmopen/libctb-0.16/src/win32/getopt.cpp
index c8454b9bde..dd8157dfdb 100644
--- a/src/mod/endpoints/mod_gsmopen/libctb-0.16/src/win32/getopt.cpp
+++ b/src/mod/endpoints/mod_gsmopen/libctb-0.16/src/win32/getopt.cpp
@@ -1,10 +1,10 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        win32/getopt.cpp
 // Purpose:
-// Author:      unknown, I found it in the internet
+// Author:      Henry Spencer
 // Id:          $Id: getopt.cpp,v 1.1.1.1 2004/11/24 10:30:11 jb Exp $
-// Copyright:   (c) 2001 ?
-// Licence:     (I think Open Source)
+// Copyright:   (c) 1984 Henry Spencer
+// Licence:     public domain
 /////////////////////////////////////////////////////////////////////////////
 
 #include <stdio.h>