diff --git a/README.md b/README.md
index ad69f0331..5f14ac8b6 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ If this is a pre-release, implementations are also encouraged to support the lat
 The OPTIMADE standard refers to a specific version of the `definition.units` database included with the source distribution of GNU Units.
 This file is included in the OPTIMADE repository under the subdirectory [units](units).
 The file is licensed separately from other files in the repository: it is available under the GNU General Public License (GPL).
-Full information on how the file is licensed is available in the [header of the file](units/definition.units) and the license file included in that directory, [COPYING](units/COPYING).
+Full information on how the file is licensed is available in the [header of the file](units/definitions.units) and the license file included in that directory, [COPYING](units/COPYING).
 
 The following does not constitute legal advice; however, we believe implementations under other licenses can use this file if:
 
diff --git a/units/README.md b/units/README.md
index 6d22d9566..de9b44034 100644
--- a/units/README.md
+++ b/units/README.md
@@ -3,4 +3,4 @@ It has been extracted from the source distribution of the GNU Units software.
 
 This file is licensed separately from other files in the repository.
 It is available under the GNU General Public License (GPL).
-Full information on how the file is licensed is available in the [header of the file](definition.units) and the license file [COPYING](units/COPYING) included in the same directory as this README.md file.
+Full information on how the file is licensed is available in the [header of the file](definitions.units) and the license file [COPYING](COPYING) included in the same directory as this README.md file.