diff --git a/.gitlab-ci/commit-rules.yml b/.gitlab-ci/commit-rules.yml
index 1ae43374c..9b43890f4 100644
--- a/.gitlab-ci/commit-rules.yml
+++ b/.gitlab-ci/commit-rules.yml
@@ -17,3 +17,5 @@ patterns:
     - regex: '^\S*\.[ch]:'
       message: Commit message subject prefix should not include .c, .h, etc.
       where: subject
+    - regex: '^Closes:?\s*#[0-9]+'
+      message: Closes instructions must be a full link