diff --git a/spring-integration-core/src/main/kotlin/org/springframework/integration/dsl/KotlinIntegrationFlowDefinition.kt b/spring-integration-core/src/main/kotlin/org/springframework/integration/dsl/KotlinIntegrationFlowDefinition.kt
index 4ed915ad64..f044296a87 100644
--- a/spring-integration-core/src/main/kotlin/org/springframework/integration/dsl/KotlinIntegrationFlowDefinition.kt
+++ b/spring-integration-core/src/main/kotlin/org/springframework/integration/dsl/KotlinIntegrationFlowDefinition.kt
@@ -145,7 +145,7 @@ class KotlinIntegrationFlowDefinition(@PublishedApi internal val delegate: Integ
 
 
 	/**
-	 * Inline function for [IntegrationFlowDefinition.filter] providing a `filter<MyTypeIn>()` variant
+	 * Inline function for [IntegrationFlowDefinition.route] providing a `route<MyTypeIn>()` variant
 	 * with reified generic type.
 	 */
 	inline fun <reified P> route(crossinline function: (P) -> Any?) {
@@ -153,7 +153,7 @@ class KotlinIntegrationFlowDefinition(@PublishedApi internal val delegate: Integ
 	}
 
 	/**
-	 * Inline function for [IntegrationFlowDefinition.filter] providing a `filter<MyTypeIn>()` variant
+	 * Inline function for [IntegrationFlowDefinition.route] providing a `route<MyTypeIn>()` variant
 	 * with reified generic type.
 	 */
 	inline fun <reified P, T> route(
diff --git a/src/reference/asciidoc/kotlin-dsl.adoc b/src/reference/asciidoc/kotlin-dsl.adoc
index 976e568ae9..73f98e640a 100644
--- a/src/reference/asciidoc/kotlin-dsl.adoc
+++ b/src/reference/asciidoc/kotlin-dsl.adoc
@@ -93,4 +93,5 @@ fun convertFlow() =
 ----
 ====
 
+NOTE: The reified type can be a whole `Message<*>` if there need access to headers as well in the lambda of the operator.