diff --git a/spring-aop/src/main/java/org/springframework/aop/framework/AopProxyUtils.java b/spring-aop/src/main/java/org/springframework/aop/framework/AopProxyUtils.java
index 0deb980516..4d38c93e55 100644
--- a/spring-aop/src/main/java/org/springframework/aop/framework/AopProxyUtils.java
+++ b/spring-aop/src/main/java/org/springframework/aop/framework/AopProxyUtils.java
@@ -86,11 +86,12 @@ public abstract class AopProxyUtils {
 			Class<?> targetClass = advised.getTargetClass();
 			if (targetClass != null) {
 				if (targetClass.isInterface()) {
-					specifiedInterfaces = new Class<?>[] {targetClass};
+					advised.setInterfaces(targetClass);
 				}
 				else if (Proxy.isProxyClass(targetClass)) {
-					specifiedInterfaces = targetClass.getInterfaces();
+					advised.setInterfaces(targetClass.getInterfaces());
 				}
+				specifiedInterfaces = advised.getProxiedInterfaces();
 			}
 		}
 		boolean addSpringProxy = !advised.isInterfaceProxied(SpringProxy.class);
diff --git a/spring-context/src/test/java/org/springframework/aop/framework/autoproxy/AutoProxyCreatorTests.java b/spring-context/src/test/java/org/springframework/aop/framework/autoproxy/AutoProxyCreatorTests.java
index 161537686f..acaa8b72f6 100644
--- a/spring-context/src/test/java/org/springframework/aop/framework/autoproxy/AutoProxyCreatorTests.java
+++ b/spring-context/src/test/java/org/springframework/aop/framework/autoproxy/AutoProxyCreatorTests.java
@@ -26,7 +26,9 @@ import org.aopalliance.intercept.MethodInvocation;
 import org.junit.Test;
 
 import org.springframework.aop.TargetSource;
+import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.aop.support.AopUtils;
+import org.springframework.aop.target.SingletonTargetSource;
 import org.springframework.beans.MutablePropertyValues;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.BeanFactoryAware;
@@ -222,7 +224,7 @@ public final class AutoProxyCreatorTests {
 		sac.registerSingleton("containerCallbackInterfacesOnly", ContainerCallbackInterfacesOnly.class);
 		sac.registerSingleton("singletonNoInterceptor", CustomProxyFactoryBean.class);
 		sac.registerSingleton("singletonToBeProxied", CustomProxyFactoryBean.class);
-		sac.registerPrototype("prototypeToBeProxied", CustomProxyFactoryBean.class);
+		sac.registerPrototype("prototypeToBeProxied", SpringProxyFactoryBean.class);
 
 		sac.refresh();
 
@@ -473,4 +475,25 @@ public final class AutoProxyCreatorTests {
 		}
 	}
 
+
+	public static class SpringProxyFactoryBean implements FactoryBean<ITestBean> {
+
+		private final TestBean tb = new TestBean();
+
+		@Override
+		public ITestBean getObject() {
+			return ProxyFactory.getProxy(ITestBean.class, new SingletonTargetSource(tb));
+		}
+
+		@Override
+		public Class<?> getObjectType() {
+			return ITestBean.class;
+		}
+
+		@Override
+		public boolean isSingleton() {
+			return false;
+		}
+	}
+
 }