diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 4386be0e2..f8f578f2a 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -19,7 +19,7 @@ The following changes are relevant for v3 custom configs that replaced certain f
 
 ### Interface changes
 These changes are relevant if you wrote custom modules for the server that depend on existing interfaces.
-- ...
+- The output of `parseContentType` in `HeaderUtil` was changed to include parameters.
 
 ## v3.0.0
 ### New features