diff --git a/pkgs/development/python-modules/pymatreader/default.nix b/pkgs/development/python-modules/pymatreader/default.nix
index 637c98bea145..2341733292a5 100644
--- a/pkgs/development/python-modules/pymatreader/default.nix
+++ b/pkgs/development/python-modules/pymatreader/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
   meta = {
     description = "Python package to read all kinds and all versions of Matlab mat files";
     homepage = "https://gitlab.com/obob/pymatreader/";
-    changelog = "https://gitlab.com/obob/pymatreader/-/blob/${src.rev}/CHANGELOG.md";
+    changelog = "https://gitlab.com/obob/pymatreader/-/blob/v${version}/CHANGELOG.md";
     license = lib.licenses.bsd2;
     maintainers = [ ];
   };