diff --git a/chapters/api-operation.adoc b/chapters/api-operation.adoc
index 08287dfdd..1ceac819c 100644
--- a/chapters/api-operation.adoc
+++ b/chapters/api-operation.adoc
@@ -3,7 +3,7 @@
 
 
 [#192]
-== {MUST} publish OpenAPI specification
+== {MUST} publish OpenAPI specification for non-component-internal APIs
 
 All service applications must publish OpenAPI specifications of their external
 APIs. While this is optional for internal APIs, i.e. APIs marked with the