diff --git a/spring-cloud-function-kotlin/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java b/spring-cloud-function-kotlin/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java
index 5f9cd2b8e..88f0a5ab0 100644
--- a/spring-cloud-function-kotlin/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java
+++ b/spring-cloud-function-kotlin/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java
@@ -102,7 +102,7 @@ public class KotlinLambdaToFunctionAutoConfiguration {
 
 
 	@SuppressWarnings({ "unchecked", "rawtypes" })
-	private static final class KotlinFunctionWrapper implements Function<Object, Object>, Supplier<Object>, Consumer<Object[]>,
+	public static final class KotlinFunctionWrapper implements Function<Object, Object>, Supplier<Object>, Consumer<Object[]>,
 			Function0<Object>, Function1<Object, Object>, Function2<Object, Object, Object>,
 			Function3<Object, Object, Object, Object>, Function4<Object, Object, Object, Object, Object>,
 			FactoryBean<FunctionRegistration>,
@@ -115,7 +115,7 @@ public class KotlinLambdaToFunctionAutoConfiguration {
 
 		private ConfigurableListableBeanFactory beanFactory;
 
-		private KotlinFunctionWrapper(Object kotlinLambdaTarget) {
+		public KotlinFunctionWrapper(Object kotlinLambdaTarget) {
 			this.kotlinLambdaTarget = kotlinLambdaTarget;
 		}