diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc4fdd3..7b860f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,7 +13,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - *getAcceptRecommendation()* does not _only_ work when _acceptMatch_ is configured in the scenario
   - schema correct is a precondion, of the checked instance is not valid, this evaluates to _REJECTED_
   - if _acceptMatch_ is configured, the result is based on the boolean result of the xpath expression evaluated against the generated report
-  - if *no* _acceptMatch_ is configured, the result is based on evaluation of schema and schematron correctnes
+  - if *no* _acceptMatch_ is configured, the result is based on evaluation of schema and schematron correctness
+  - _UNDEFINED_ is only returned, when processing is stopped somehow
+- *isAcceptable()* can no evaluate to true, when no _acceptMatch_ is configured (see above)
  
 ## 1.1.3
 ### Fixed