diff --git a/spring-core/src/main/java/org/springframework/core/KotlinDetector.java b/spring-core/src/main/java/org/springframework/core/KotlinDetector.java
index fde4e10a6c..b7bb1de0d3 100644
--- a/spring-core/src/main/java/org/springframework/core/KotlinDetector.java
+++ b/spring-core/src/main/java/org/springframework/core/KotlinDetector.java
@@ -19,6 +19,8 @@ package org.springframework.core;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 
+import kotlin.reflect.jvm.ReflectJvmMapping;
+
 import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
 
@@ -93,4 +95,15 @@ public abstract class KotlinDetector {
 		return false;
 	}
 
+	/**
+	 * Return {@code true} if the method is a kotlin function.
+	 * @since 6.1.3
+	 */
+	public static boolean isKotlinFunction(Method method) {
+		if (KotlinDetector.isKotlinType(method.getDeclaringClass())) {
+			return ReflectJvmMapping.getKotlinFunction(method) != null;
+		}
+		return false;
+	}
+
 }
diff --git a/spring-web/src/main/java/org/springframework/web/method/support/InvocableHandlerMethod.java b/spring-web/src/main/java/org/springframework/web/method/support/InvocableHandlerMethod.java
index 2b5b0e8c57..5f5e3916d6 100644
--- a/spring-web/src/main/java/org/springframework/web/method/support/InvocableHandlerMethod.java
+++ b/spring-web/src/main/java/org/springframework/web/method/support/InvocableHandlerMethod.java
@@ -255,7 +255,7 @@ public class InvocableHandlerMethod extends HandlerMethod {
 				if (KotlinDetector.isSuspendingFunction(method)) {
 					return invokeSuspendingFunction(method, getBean(), args);
 				}
-				else if (KotlinDetector.isKotlinType(method.getDeclaringClass())) {
+				else if (KotlinDetector.isKotlinFunction(method)) {
 					return KotlinDelegate.invokeFunction(method, getBean(), args);
 				}
 			}