diff --git a/jdk/src/share/classes/javax/swing/UIDefaults.java b/jdk/src/share/classes/javax/swing/UIDefaults.java
index 9f22122d7b2..9f304e742c7 100644
--- a/jdk/src/share/classes/javax/swing/UIDefaults.java
+++ b/jdk/src/share/classes/javax/swing/UIDefaults.java
@@ -677,6 +677,8 @@ public class UIDefaults extends Hashtable<Object,Object>
         try {
             String className = (String)get(uiClassID);
             if (className != null) {
+                ReflectUtil.checkPackageAccess(className);
+
                 Class cls = (Class)get(className);
                 if (cls == null) {
                     if (uiClassLoader == null) {