diff --git a/spring-beans/src/main/java/org/springframework/beans/factory/support/ReplaceOverride.java b/spring-beans/src/main/java/org/springframework/beans/factory/support/ReplaceOverride.java
index ea8c3495c54..1b51bf70655 100644
--- a/spring-beans/src/main/java/org/springframework/beans/factory/support/ReplaceOverride.java
+++ b/spring-beans/src/main/java/org/springframework/beans/factory/support/ReplaceOverride.java
@@ -49,7 +49,7 @@ public class ReplaceOverride extends MethodOverride {
 	 */
 	public ReplaceOverride(String methodName, String methodReplacerBeanName) {
 		super(methodName);
-		Assert.notNull(methodName, "Method replacer bean name must not be null");
+		Assert.notNull(methodReplacerBeanName, "Method replacer bean name must not be null");
 		this.methodReplacerBeanName = methodReplacerBeanName;
 	}