diff --git a/rust/threshold-mock/CONTRIBUTING.md b/rust/threshold-mock/CONTRIBUTING.md
index bbbaea5c4..d8b07442f 100644
--- a/rust/threshold-mock/CONTRIBUTING.md
+++ b/rust/threshold-mock/CONTRIBUTING.md
@@ -16,5 +16,4 @@ We always appreciate bug reports through [GitHub issues].
 [GitHub issues]: https://github.com/dfinity/TODO/issues
 [forum]: https://forum.dfinity.org/
 [LICENSE]: LICENSE
-[HACKING]: HACKING.md
 [README]: README.md