diff --git a/spring-context/src/main/java/org/springframework/context/annotation/CommonAnnotationBeanPostProcessor.java b/spring-context/src/main/java/org/springframework/context/annotation/CommonAnnotationBeanPostProcessor.java
index 9aef3f1a11d..d2059526a57 100644
--- a/spring-context/src/main/java/org/springframework/context/annotation/CommonAnnotationBeanPostProcessor.java
+++ b/spring-context/src/main/java/org/springframework/context/annotation/CommonAnnotationBeanPostProcessor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -151,7 +151,7 @@ public class CommonAnnotationBeanPostProcessor extends InitDestroyAnnotationBean
 	@Nullable
 	private static Class<? extends Annotation> ejbRefClass;
 
-	private static Set<Class<? extends Annotation>> resourceAnnotationTypes = new LinkedHashSet<>(4);
+	private final static Set<Class<? extends Annotation>> resourceAnnotationTypes = new LinkedHashSet<>(4);
 
 	static {
 		try {