diff --git a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/webflux/ReactiveWebServerAutoConfiguration.java b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/webflux/ReactiveWebServerAutoConfiguration.java
index 3198b34aeea..dcac771d13e 100644
--- a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/webflux/ReactiveWebServerAutoConfiguration.java
+++ b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/webflux/ReactiveWebServerAutoConfiguration.java
@@ -84,9 +84,11 @@ public class ReactiveWebServerAutoConfiguration {
 			}
 			if (ObjectUtils.isEmpty(this.beanFactory.getBeanNamesForType(
 					ReactiveWebServerCustomizerBeanPostProcessor.class, true, false))) {
+				RootBeanDefinition beanDefinition = new RootBeanDefinition(
+						ReactiveWebServerCustomizerBeanPostProcessor.class);
+				beanDefinition.setSynthetic(true);
 				registry.registerBeanDefinition(
-						"reactiveWebServerCustomizerBeanPostProcessor",
-						new RootBeanDefinition(ReactiveWebServerCustomizerBeanPostProcessor.class));
+						"reactiveWebServerCustomizerBeanPostProcessor", beanDefinition);
 
 			}
 		}
diff --git a/spring-boot/src/main/java/org/springframework/boot/context/embedded/ReactiveWebServerCustomizerBeanPostProcessor.java b/spring-boot/src/main/java/org/springframework/boot/context/embedded/ReactiveWebServerCustomizerBeanPostProcessor.java
index 36693a8066a..4992640cc87 100644
--- a/spring-boot/src/main/java/org/springframework/boot/context/embedded/ReactiveWebServerCustomizerBeanPostProcessor.java
+++ b/spring-boot/src/main/java/org/springframework/boot/context/embedded/ReactiveWebServerCustomizerBeanPostProcessor.java
@@ -22,29 +22,30 @@ import java.util.Collections;
 import java.util.List;
 
 import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.BeanFactoryAware;
+import org.springframework.beans.factory.ListableBeanFactory;
 import org.springframework.beans.factory.config.BeanPostProcessor;
-import org.springframework.context.ApplicationContext;
-import org.springframework.context.ApplicationContextAware;
 import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 
 /**
  * {@link BeanPostProcessor} that applies all {@link ReactiveWebServerCustomizer}s
  * from the bean factory to {@link ConfigurableReactiveWebServer} beans.
  *
- *
  * @author Brian Clozel
+ * @author Stephane Nicoll
+ * @since 2.0.0
  */
 public class ReactiveWebServerCustomizerBeanPostProcessor
-		implements BeanPostProcessor, ApplicationContextAware {
+		implements BeanPostProcessor, BeanFactoryAware {
 
-	private ApplicationContext applicationContext;
+	private ListableBeanFactory beanFactory;
 
 	private List<ReactiveWebServerCustomizer> customizers;
 
 	@Override
-	public void setApplicationContext(ApplicationContext applicationContext)
-			throws BeansException {
-		this.applicationContext = applicationContext;
+	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+		this.beanFactory = (ListableBeanFactory) beanFactory;
 	}
 
 	@Override
@@ -73,7 +74,7 @@ public class ReactiveWebServerCustomizerBeanPostProcessor
 		if (this.customizers == null) {
 			// Look up does not include the parent context
 			this.customizers = new ArrayList<ReactiveWebServerCustomizer>(
-					this.applicationContext
+					this.beanFactory
 							.getBeansOfType(ReactiveWebServerCustomizer.class,
 									false, false)
 							.values());