diff --git a/core-principles/implementation-maturity.md b/core-principles/implementation-maturity.md
index 1be63e4..d28c464 100644
--- a/core-principles/implementation-maturity.md
+++ b/core-principles/implementation-maturity.md
@@ -1,7 +1,7 @@
 # Implementation Maturity
 Every API design using the HTTP(S) protocol MUST use the appropriate **HTTP Request Method semantics** ([Richardson Maturity Model Level 2](https://martinfowler.com/articles/richardsonMaturityModel.html#level2)) to implement any action afforded by a resource.
 
-An API design implementation SHOULD include **hypermedia controls** ([Richardson Maturity Model Level 3](https://martinfowler.com/articles/richardsonMaturityModel.html#level3)).
+An API design implementation SHOULD include **hypermedia controls**–HATEOAS–([Richardson Maturity Model Level 3](https://martinfowler.com/articles/richardsonMaturityModel.html#level3)).
 
 
 (TODO: see HTTP Verbs Appendix)