diff --git a/include/async_mqtt5/mqtt_client.hpp b/include/async_mqtt5/mqtt_client.hpp
index 6f39b83..1c926b4 100644
--- a/include/async_mqtt5/mqtt_client.hpp
+++ b/include/async_mqtt5/mqtt_client.hpp
@@ -85,8 +85,19 @@ public:
 		mqtt_client(context.get_executor(), cnf, std::move(tls_context))
 	{}
 
-	/// Copy constructor.
-	mqtt_client(const mqtt_client& other) = delete;
+	/// Move-construct an mqtt_client from another.
+	/** Moved-from client can only be destructed. */
+	mqtt_client(mqtt_client&& other) noexcept = default;
+
+	/// Move-assign an mqtt_client from another.
+	/** Cancels this client first.
+	 * Moved-from client can only be destructed.
+	 */
+	mqtt_client& operator=(mqtt_client&& other) noexcept {
+		cancel();
+		_svc_ptr = std::move(other._svc_ptr);
+		return *this;
+	}
 
 	/**
 	 * \brief Destructor.
@@ -94,7 +105,7 @@ public:
 	 * \details Automatically calls \ref mqtt_client::cancel.
 	 */
 	~mqtt_client() {
-		cancel();
+		if (_svc_ptr) cancel();
 	}
 
 	/**