diff --git a/web/src/main/java/org/springframework/security/web/savedrequest/SimpleSavedRequest.java b/web/src/main/java/org/springframework/security/web/savedrequest/SimpleSavedRequest.java
index e1595ea6bdc..08165eb0cd3 100644
--- a/web/src/main/java/org/springframework/security/web/savedrequest/SimpleSavedRequest.java
+++ b/web/src/main/java/org/springframework/security/web/savedrequest/SimpleSavedRequest.java
@@ -126,7 +126,7 @@ public void setHeaders(Map<String, List<String>> headers) {
 	}
 
 	public void setLocales(List<Locale> locales) {
-		Assert.notNull("locales cannot be null");
+		Assert.notNull(locales, "locales cannot be null");
 		this.locales = locales;
 	}