diff --git a/Changelog.md b/Changelog.md
index 1f058e2cb..940a2cb40 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,6 +1,10 @@
 Changelog
 =========
 
+### 2.4.0 (2020-01-08)
+
+* Deprecated the `CommentExtension::isCommentDeleted` method.
+
 ### 2.3.3 (2019-11-06)
 
 * Fix: use `Symfony\Contracts\EventDispatcher\Event` if available.
diff --git a/Twig/CommentExtension.php b/Twig/CommentExtension.php
index 3a41acbfd..502fcd532 100644
--- a/Twig/CommentExtension.php
+++ b/Twig/CommentExtension.php
@@ -64,6 +64,8 @@ public function getTests()
      */
     public function isCommentDeleted(CommentInterface $comment)
     {
+        @trigger_error('The "isCommentDeleted" method is deprecated since version 2.4 and will be removed in 3.0. Use "isCommentInState" instead.', E_USER_DEPRECATED);
+
         return $this->isCommentInState($comment, $comment::STATE_DELETED);
     }