diff --git a/paimon-api/src/main/java/org/apache/paimon/CoreOptions.java b/paimon-api/src/main/java/org/apache/paimon/CoreOptions.java
index 78ce3d93678c..9fc23b650b01 100644
--- a/paimon-api/src/main/java/org/apache/paimon/CoreOptions.java
+++ b/paimon-api/src/main/java/org/apache/paimon/CoreOptions.java
@@ -1391,6 +1391,7 @@ public InlineElement getDescription() {
                             "If the bucket is -1, for primary key table, is dynamic bucket mode, "
                                     + "this option controls the target row number for one bucket.");
 
+    @Immutable
     public static final ConfigOption<Integer> DYNAMIC_BUCKET_INITIAL_BUCKETS =
             key("dynamic-bucket.initial-buckets")
                     .intType()