diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java b/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java
index 39c44e104..16dd29d1f 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java
@@ -1343,6 +1343,13 @@ public enum Status implements StatusType {
          * @since 2.0
          */
         EXPECTATION_FAILED(417, "Expectation Failed"),
+        /**
+         * 423 Locked, see <a href="https://datatracker.ietf.org/doc/html/rfc4918#section-11.3">RFC 4918: HTTP Extensions
+         * for Web Distributed Authoring and Versioning</a>.
+         *
+         * @since 5.0
+         */
+        LOCKED(423, "LOCKED"),
         /**
          * 428 Precondition required, see <a href="https://tools.ietf.org/html/rfc6585#section-3">RFC 6585: Additional HTTP
          * Status Codes</a>.