diff --git a/spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java b/spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java
index e1c2f0ddfe..65326f6e26 100644
--- a/spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java
+++ b/spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -201,15 +201,13 @@ class CglibAopProxy implements AopProxy, Serializable {
 			return createProxyClassAndInstance(enhancer, callbacks);
 		}
 		catch (CodeGenerationException ex) {
-			throw new AopConfigException("Could not generate CGLIB subclass of class [" +
-					this.advised.getTargetClass() + "]: " +
-					"Common causes of this problem include using a final class or a non-visible class",
+			throw new AopConfigException("Could not generate CGLIB subclass of " + this.advised.getTargetClass() +
+					": Common causes of this problem include using a final class or a non-visible class",
 					ex);
 		}
 		catch (IllegalArgumentException ex) {
-			throw new AopConfigException("Could not generate CGLIB subclass of class [" +
-					this.advised.getTargetClass() + "]: " +
-					"Common causes of this problem include using a final class or a non-visible class",
+			throw new AopConfigException("Could not generate CGLIB subclass of " + this.advised.getTargetClass() +
+					": Common causes of this problem include using a final class or a non-visible class",
 					ex);
 		}
 		catch (Throwable ex) {
@@ -259,7 +257,7 @@ class CglibAopProxy implements AopProxy, Serializable {
 			Method[] methods = proxySuperClass.getDeclaredMethods();
 			for (Method method : methods) {
 				int mod = method.getModifiers();
-				if (!Modifier.isStatic(mod)) {
+				if (!Modifier.isStatic(mod) && !Modifier.isPrivate(mod)) {
 					if (Modifier.isFinal(mod)) {
 						if (implementsInterface(method, ifcs)) {
 							logger.warn("Unable to proxy interface-implementing method [" + method + "] because " +
@@ -269,7 +267,7 @@ class CglibAopProxy implements AopProxy, Serializable {
 								"Calls to this method will NOT be routed to the target instance and " +
 								"might lead to NPEs against uninitialized fields in the proxy instance.");
 					}
-					else if (!Modifier.isPublic(mod) && !Modifier.isProtected(mod) && !Modifier.isPrivate(mod) &&
+					else if (!Modifier.isPublic(mod) && !Modifier.isProtected(mod) &&
 							proxyClassLoader != null && proxySuperClass.getClassLoader() != proxyClassLoader) {
 						logger.info("Method [" + method + "] is package-visible across different ClassLoaders " +
 								"and cannot get proxied via CGLIB: Declare this method as public or protected " +
diff --git a/spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassEnhancer.java b/spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassEnhancer.java
index e26b1e23ff..d065682e9a 100644
--- a/spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassEnhancer.java
+++ b/spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassEnhancer.java
@@ -118,9 +118,9 @@ class ConfigurationClassEnhancer {
 	/**
 	 * Creates a new CGLIB {@link Enhancer} instance.
 	 */
-	private Enhancer newEnhancer(Class<?> superclass, ClassLoader classLoader) {
+	private Enhancer newEnhancer(Class<?> configSuperClass, ClassLoader classLoader) {
 		Enhancer enhancer = new Enhancer();
-		enhancer.setSuperclass(superclass);
+		enhancer.setSuperclass(configSuperClass);
 		enhancer.setInterfaces(new Class<?>[] {EnhancedConfiguration.class});
 		enhancer.setUseFactory(false);
 		enhancer.setNamingPolicy(SpringNamingPolicy.INSTANCE);