diff --git a/src/main/java/org/springframework/data/jpa/repository/config/JpaRepositoryConfigExtension.java b/src/main/java/org/springframework/data/jpa/repository/config/JpaRepositoryConfigExtension.java
index df40eb780..d19971c57 100644
--- a/src/main/java/org/springframework/data/jpa/repository/config/JpaRepositoryConfigExtension.java
+++ b/src/main/java/org/springframework/data/jpa/repository/config/JpaRepositoryConfigExtension.java
@@ -22,6 +22,7 @@ import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.support.AbstractBeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.context.annotation.AnnotationConfigUtils;
 import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.dao.DataAccessException;
 import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
@@ -145,7 +146,8 @@ public class JpaRepositoryConfigExtension extends RepositoryConfigurationExtensi
 			registerWithSourceAndGeneratedBeanName(registry, definition, configurationSource.getSource());
 		}
 
-		if (!hasBean(PAB_POST_PROCESSOR, registry)) {
+		if (!hasBean(PAB_POST_PROCESSOR, registry)
+				&& !registry.containsBeanDefinition(AnnotationConfigUtils.PERSISTENCE_ANNOTATION_PROCESSOR_BEAN_NAME)) {
 
 			AbstractBeanDefinition definition = BeanDefinitionBuilder.rootBeanDefinition(PAB_POST_PROCESSOR)
 					.getBeanDefinition();
diff --git a/src/test/java/org/springframework/data/jpa/repository/config/JpaRepositoryConfigExtensionUnitTests.java b/src/test/java/org/springframework/data/jpa/repository/config/JpaRepositoryConfigExtensionUnitTests.java
new file mode 100644
index 000000000..381bbd924
--- /dev/null
+++ b/src/test/java/org/springframework/data/jpa/repository/config/JpaRepositoryConfigExtensionUnitTests.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2013 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.jpa.repository.config;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import java.util.Arrays;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.beans.factory.support.RootBeanDefinition;
+import org.springframework.context.annotation.AnnotationConfigUtils;
+import org.springframework.data.repository.config.RepositoryConfigurationExtension;
+import org.springframework.data.repository.config.RepositoryConfigurationSource;
+import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor;
+
+/**
+ * Unit tests for {@link JpaRepositoryConfigExtension}.
+ * 
+ * @author Oliver Gierke
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class JpaRepositoryConfigExtensionUnitTests {
+
+	@Mock
+	RepositoryConfigurationSource configSource;
+
+	@Rule
+	public ExpectedException exception = ExpectedException.none();
+
+	@Test
+	public void registersDefaultBeanPostProcessorsByDefault() {
+
+		DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
+
+		RepositoryConfigurationExtension extension = new JpaRepositoryConfigExtension();
+		extension.registerBeansForRoot(factory, configSource);
+
+		Iterable<String> names = Arrays.asList(factory.getBeanDefinitionNames());
+
+		assertThat(names, hasItem(startsWith("org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor")));
+		assertThat(names,
+				hasItem(startsWith("org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor")));
+		assertThat(
+				names,
+				hasItem(startsWith("org.springframework.data.repository.core.support.RepositoryInterfaceAwareBeanPostProcessor")));
+	}
+
+	@Test
+	public void doesNotRegisterProcessorIfAlreadyPresent() {
+
+		DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
+		RootBeanDefinition pabppDefinition = new RootBeanDefinition(PersistenceAnnotationBeanPostProcessor.class);
+		String beanName = BeanDefinitionReaderUtils.generateBeanName(pabppDefinition, factory);
+		factory.registerBeanDefinition(beanName, pabppDefinition);
+
+		assertOnlyOnePersistenceAnnotationBeanPostProcessorRegistered(factory, beanName);
+	}
+
+	@Test
+	public void doesNotRegisterProcessorIfAutoRegistered() {
+
+		DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
+		RootBeanDefinition pabppDefinition = new RootBeanDefinition(PersistenceAnnotationBeanPostProcessor.class);
+		String beanName = AnnotationConfigUtils.PERSISTENCE_ANNOTATION_PROCESSOR_BEAN_NAME;
+		factory.registerBeanDefinition(beanName, pabppDefinition);
+
+		assertOnlyOnePersistenceAnnotationBeanPostProcessorRegistered(factory, beanName);
+	}
+
+	private void assertOnlyOnePersistenceAnnotationBeanPostProcessorRegistered(DefaultListableBeanFactory factory,
+			String expectedBeanName) {
+
+		RepositoryConfigurationExtension extension = new JpaRepositoryConfigExtension();
+		extension.registerBeansForRoot(factory, configSource);
+
+		assertThat(factory.getBean(expectedBeanName), is(notNullValue()));
+		exception.expect(NoSuchBeanDefinitionException.class);
+		factory.getBeanDefinition("org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor#1");
+	}
+}