diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index da6ba6f8e6..8c04e20b77 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -145,6 +145,7 @@ For a pull request to be considered at all it has to meet these requirements:
 1. Regardless if the code introduces new features or fixes bugs or regressions, it must have comprehensive tests.
 1. The code must be well documented in the Lightbend's standard documentation format (see the ‘Documentation’ section below).
 1. The commit messages must properly describe the changes, see further below.
+1. A pull request must indicate (link to) the issue it is aimed to resolve in the description (or comments) of the PR, in order to establish a link between PR and Issue. This can be achieved by writing "Fixes #1234" or similar in PR description.
 1. All Lightbend projects must include Lightbend copyright notices.  Each project can choose between one of two approaches:
 
     1. All source files in the project must have a Lightbend copyright notice in the file header.