diff --git a/src/3rdparty/README.licensing b/src/3rdparty/README.licensing
--- a/src/3rdparty/README.licensing
+++ b/src/3rdparty/README.licensing
@@ -1,3 +1,3 @@
 The files in this directory are not licensed under the same terms as the
-rest of OpenTTD. Licensing details can be found in OpenTTD's readme.txt
+rest of OpenTTD. Licensing details can be found in OpenTTD's README.md
 and in this directory or subdirectories as well.