diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 49f082979a..58574a8a4e 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -237,6 +237,7 @@ language is used within pull-request comments:
     issues, legal justification). NACKs without accompanying reasoning may be
     disregarded;
   - utACK means "I have not tested the code, but I have reviewed it and it looks
+    OK, I agree it can be merged";
   - Nit refers to trivial, often non-blocking issues.
 
 Project maintainers reserve the right to weigh the opinions of peer reviewers