diff --git a/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/FunctionTypeUtils.java b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/FunctionTypeUtils.java
index d7d8863b3..58581746c 100644
--- a/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/FunctionTypeUtils.java
+++ b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/catalog/FunctionTypeUtils.java
@@ -171,8 +171,6 @@ public final class FunctionTypeUtils {
 
 	@SuppressWarnings("unchecked")
 	public static Type discoverFunctionTypeFromClass(Class<?> functionalClass) {
-		Assert.isTrue(isFunctional(functionalClass), "Type must be one of Supplier, Function or Consumer");
-
 		if (Function.class.isAssignableFrom(functionalClass)) {
 			for (Type superInterface : functionalClass.getGenericInterfaces()) {
 				if (superInterface != null && !superInterface.equals(Object.class)) {
diff --git a/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java
index 3b6209447..1076ab738 100644
--- a/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java
+++ b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/config/KotlinLambdaToFunctionAutoConfiguration.java
@@ -98,9 +98,6 @@ public class KotlinLambdaToFunctionAutoConfiguration {
 			if (ObjectUtils.isEmpty(input)) {
 				return this.invoke();
 			}
-			else if (ObjectUtils.isArray(input)) {
-				return null;
-			}
 			else {
 				return this.invoke(input);
 			}