diff --git a/core/src/main/java/org/apache/struts2/StrutsConstants.java b/core/src/main/java/org/apache/struts2/StrutsConstants.java
index d882ae82fb..bfe639d2e7 100644
--- a/core/src/main/java/org/apache/struts2/StrutsConstants.java
+++ b/core/src/main/java/org/apache/struts2/StrutsConstants.java
@@ -278,6 +278,7 @@ public final class StrutsConstants {
 
     /**
      * Specifies the type of cache to use for BeanInfo objects.
+     * @since 6.4.0
      * @see StrutsConstants#STRUTS_OGNL_EXPRESSION_CACHE_TYPE
      */
     public static final String STRUTS_OGNL_BEANINFO_CACHE_TYPE = "struts.ognl.beanInfoCacheType";
@@ -332,6 +333,7 @@ public final class StrutsConstants {
      *     <li>For the LRU cache, once the maximum cache size is reached, the least-recently-used entry will be removed.
      *     </li>
      * </ul>
+     * @since 6.4.0
      */
     public static final String STRUTS_OGNL_EXPRESSION_CACHE_TYPE = "struts.ognl.expressionCacheType";