diff --git a/xwork-core/src/main/java/com/opensymphony/xwork2/interceptor/ParametersInterceptor.java b/xwork-core/src/main/java/com/opensymphony/xwork2/interceptor/ParametersInterceptor.java
index d26d09457..8317feb1a 100644
--- a/xwork-core/src/main/java/com/opensymphony/xwork2/interceptor/ParametersInterceptor.java
+++ b/xwork-core/src/main/java/com/opensymphony/xwork2/interceptor/ParametersInterceptor.java
@@ -362,7 +362,7 @@ public class ParametersInterceptor extends MethodFilterInterceptor {
         }
         boolean result = true;
         for (Object obj : values) {
-            if (isExcluded(obj.toString())) {
+            if (isExcluded(String.valueOf(obj))) {
                 result = false;
             }
         }