diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c11953c8..c4e45f436 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Improved
 
 * Added screen reader text to the "Follow Me" block for improved accessibility
+* Added `media_type` support to Activity-Object-Transformers
 * Clarified settings page text around which users get Activitypub profiles
 
 ### Fixed
diff --git a/includes/transformer/class-base.php b/includes/transformer/class-base.php
index 6d4c202a6..fd275fd3b 100644
--- a/includes/transformer/class-base.php
+++ b/includes/transformer/class-base.php
@@ -120,11 +120,22 @@ abstract protected function get_id();
 
 	/**
 	 * Get the replies Collection.
+	 *
+	 * @return array The replies collection.
 	 */
 	public function get_replies() {
 		return Replies::get_collection( $this->wp_object );
 	}
 
+	/**
+	 * Returns the default media type for an Object.
+	 *
+	 * @return string The media type.
+	 */
+	public function get_media_type() {
+		return 'text/html';
+	}
+
 	/**
 	 * Returns the ID of the WordPress Object.
 	 */
diff --git a/readme.txt b/readme.txt
index 2c1b98c9e..128f6954b 100644
--- a/readme.txt
+++ b/readme.txt
@@ -134,7 +134,8 @@ For reasons of data protection, it is not possible to see the followers of other
 
 = Unreleased =
 
-* Added: Screen reader text for the "Follow Me" block for improved accessibility
+* Improved: Added screen reader text for the "Follow Me" block for improved accessibility
+* Improved: Added `media_type` support to Activity-Object-Transformers
 * Improved: Clarified settings page text around which users get Activitypub profiles
 * Fixed: Prevent hex color codes in HTML attributes from being added as post tags
 * Fixed: A typo in the custom post content settings