diff --git a/lib/native/mqtt5.ts b/lib/native/mqtt5.ts
index a3779e0e..b3953f75 100644
--- a/lib/native/mqtt5.ts
+++ b/lib/native/mqtt5.ts
@@ -39,111 +39,6 @@ export * from '../common/mqtt5_packet';
  */
 export type WebsocketHandshakeTransform = (request: http.HttpRequest, done: (error_code?: number) => void) => void;
 
-/**
- * An enumeration that controls how the client applies topic aliasing to outbound publish packets.
- *
- * Topic alias behavior is described in https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901113
- */
-export enum OutboundTopicAliasBehaviorType {
-
-    /**
-     * Maps to Disabled.  This keeps the client from being broken (by default) if the broker
-     * topic aliasing implementation has a problem.
-     */
-    Default = 0,
-
-    /**
-     * Outbound aliasing is the user's responsibility.  Client will cache and use
-     * previously-established aliases if they fall within the negotiated limits of the connection.
-     *
-     * The user must still always submit a full topic in their publishes because disconnections disrupt
-     * topic alias mappings unpredictably.  The client will properly use a requested alias when the most-recently-seen
-     * binding for a topic alias value matches the alias and topic in the publish packet.
-     */
-    Manual = 1,
-
-    /**
-     * (Recommended) The client will ignore any user-specified topic aliasing and instead use an LRU cache to drive
-     * alias usage.
-     */
-    LRU = 2,
-
-    /**
-     * Completely disable outbound topic aliasing.
-     */
-    Disabled = 3,
-}
-
-/**
- * An enumeration that controls whether or not the client allows the broker to send publishes that use topic
- * aliasing.
- *
- * Topic alias behavior is described in https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901113
- */
-export enum InboundTopicAliasBehaviorType {
-
-    /**
-     * Maps to Disabled.  This keeps the client from being broken (by default) if the broker
-     * topic aliasing implementation has a problem.
-     */
-    Default = 0,
-
-    /**
-     * Allow the server to send PUBLISH packets to the client that use topic aliasing
-     */
-    Enabled = 1,
-
-    /**
-     * Forbid the server from sending PUBLISH packets to the client that use topic aliasing
-     */
-    Disabled = 2,
-}
-
-/**
- * Configuration for all client topic aliasing behavior.
- */
-export interface TopicAliasingOptions {
-
-    /**
-     * Controls what kind of outbound topic aliasing behavior the client should attempt to use.
-     *
-     * If topic aliasing is not supported by the server, this setting has no effect and any attempts to directly
-     * manipulate the topic alias id in outbound publishes will be ignored.
-     *
-     * If left undefined, then outbound topic aliasing is disabled.
-     */
-    outboundBehavior?: OutboundTopicAliasBehaviorType,
-
-    /**
-     * If outbound topic aliasing is set to LRU, this controls the maximum size of the cache.  If outbound topic
-     * aliasing is set to LRU and this is zero or undefined, a sensible default is used (25).  If outbound topic
-     * aliasing is not set to LRU, then this setting has no effect.
-     *
-     * The final size of the cache is determined by the minimum of this setting and the value of the
-     * topic_alias_maximum property of the received CONNACK.  If the received CONNACK does not have an explicit
-     * positive value for that field, outbound topic aliasing is disabled for the duration of that connection.
-     */
-    outboundCacheMaxSize?: number,
-
-    /**
-     * Controls whether or not the client allows the broker to use topic aliasing when sending publishes.  Even if
-     * inbound topic aliasing is enabled, it is up to the server to choose whether or not to use it.
-     *
-     * If left undefined, then inbound topic aliasing is disabled.
-     */
-    inboundBehavior?: InboundTopicAliasBehaviorType,
-
-    /**
-     * If inbound topic aliasing is enabled, this will control the size of the inbound alias cache.  If inbound
-     * aliases are enabled and this is zero or undefined, then a sensible default will be used (25).  If inbound
-     * aliases are disabled, this setting has no effect.
-     *
-     * Behaviorally, this value overrides anything present in the topic_alias_maximum field of
-     * the CONNECT packet options.
-     */
-    inboundCacheMaxSize?: number,
-}
-
 /**
  * Information about the client's queue of operations
  */
@@ -368,15 +263,6 @@ export interface Mqtt5ClientConfig {
      * @group Node-only
      */
     extendedValidationAndFlowControlOptions? : ClientExtendedValidationAndFlowControl;
-
-    /**
-     * Additional controls for client behavior with respect to topic alias usage.
-     *
-     * If this setting is left undefined, then topic aliasing behavior will be disabled.
-     *
-     * @group Node-only
-     */
-    topicAliasingOptions? : TopicAliasingOptions
 }
 
 /**