diff --git a/spring-context/src/main/java/org/springframework/validation/AbstractPropertyBindingResult.java b/spring-context/src/main/java/org/springframework/validation/AbstractPropertyBindingResult.java
index 52c86a2b1f..7a3ffc4ac9 100644
--- a/spring-context/src/main/java/org/springframework/validation/AbstractPropertyBindingResult.java
+++ b/spring-context/src/main/java/org/springframework/validation/AbstractPropertyBindingResult.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -42,7 +42,7 @@ import org.springframework.util.Assert;
 @SuppressWarnings("serial")
 public abstract class AbstractPropertyBindingResult extends AbstractBindingResult {
 
-	private ConversionService conversionService;
+	private transient ConversionService conversionService;
 
 
 	/**