diff --git a/include/dsn/dist/replication/replica_envs.h b/include/dsn/dist/replication/replica_envs.h
index f21a3d8d83..d25f731354 100644
--- a/include/dsn/dist/replication/replica_envs.h
+++ b/include/dsn/dist/replication/replica_envs.h
@@ -57,6 +57,7 @@ class replica_envs
     static const std::string REPLICA_ACCESS_CONTROLLER_ALLOWED_USERS;
     static const std::string READ_QPS_THROTTLING;
     static const std::string SPLIT_VALIDATE_PARTITION_HASH;
+    static const std::string USER_SPECIFIED_COMPACTION;
 };
 
 } // namespace replication
diff --git a/src/common/replication_common.cpp b/src/common/replication_common.cpp
index 685995f624..928f3afe11 100644
--- a/src/common/replication_common.cpp
+++ b/src/common/replication_common.cpp
@@ -648,6 +648,7 @@ const std::string replica_envs::REPLICA_ACCESS_CONTROLLER_ALLOWED_USERS(
 const std::string replica_envs::READ_QPS_THROTTLING("replica.read_throttling");
 const std::string
     replica_envs::SPLIT_VALIDATE_PARTITION_HASH("replica.split.validate_partition_hash");
+const std::string replica_envs::USER_SPECIFIED_COMPACTION("user_specified_compaction");
 
 const std::string bulk_load_constant::BULK_LOAD_INFO("bulk_load_info");
 const int32_t bulk_load_constant::BULK_LOAD_REQUEST_INTERVAL = 10;
diff --git a/src/meta/app_env_validator.cpp b/src/meta/app_env_validator.cpp
index a4cf445233..0181cc737e 100644
--- a/src/meta/app_env_validator.cpp
+++ b/src/meta/app_env_validator.cpp
@@ -173,7 +173,8 @@ void app_env_validator::register_all_validators()
         {replica_envs::READ_QPS_THROTTLING,
          std::bind(&check_throttling, std::placeholders::_1, std::placeholders::_2)},
         {replica_envs::SPLIT_VALIDATE_PARTITION_HASH,
-         std::bind(&check_split_validation, std::placeholders::_1, std::placeholders::_2)}};
+         std::bind(&check_split_validation, std::placeholders::_1, std::placeholders::_2)},
+        {replica_envs::USER_SPECIFIED_COMPACTION, nullptr}};
 }
 
 } // namespace replication