diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b0987ebfcb..f241c8f0fa 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -114,3 +114,7 @@ TODO
 
 TODO: It is strongly recommended that you validate your contributions before
 you make significant efforts…
+
+The "Assigned" field on a PR indicates who has taken responsibility
+for reviewing the PR, not who is responsible for the content of the
+PR.