diff --git a/src/PromiseInterface.php b/src/PromiseInterface.php
index edcb0077..0adaf484 100644
--- a/src/PromiseInterface.php
+++ b/src/PromiseInterface.php
@@ -35,7 +35,7 @@ interface PromiseInterface
      * @param callable|null $onFulfilled
      * @param callable|null $onRejected
      * @param callable|null $onProgress This argument is deprecated and should not be used anymore.
-     * @return PromiseInterface
+     * @return self
      */
     public function then(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null);
 }