diff --git a/COPYRIGHT.txt b/COPYRIGHT.txt
index 9a525d4f89e..698e4b1dc89 100644
--- a/COPYRIGHT.txt
+++ b/COPYRIGHT.txt
@@ -277,6 +277,11 @@ Files: ./thirdparty/squish/
 Copyright: 2006, Simon Brown
 License: Expat
 
+Files: ./thirdparty/tinyexr/
+Copyright: 2014-2017, Syoyo Fujita
+  2002, Industrial Light & Magic, a division of Lucas Digital Ltd. LLC
+License: BSD-3-Clause
+
 Files: ./thirdparty/zlib/
 Copyright: 1995-2017, Jean-loup Gailly and Mark Adler
 License: Zlib
diff --git a/thirdparty/README.md b/thirdparty/README.md
index 1c4bad48361..81b1a971c06 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -318,6 +318,21 @@ Files extracted from upstream source:
 - COPYING and LICENSE
 
 
+## tinyexr
+
+- Upstream: https://github.com/syoyo/tinyexr
+- Version: 0.9.5+ (git a145d69)
+- License: BSD-3-Clause
+
+Files extracted from upstream source:
+
+- `tinyexr.{cc,h}`
+
+Important: Some changes were made to get TinyEXR to build on the ancient
+MinGW-w64 toolchain of Travis CI.
+https://github.com/godotengine/godot/commit/37f5e1dcd94611dd5b670f013abf0323e8b47def
+
+
 ## zlib
 
 - Upstream: http://www.zlib.net/