diff --git a/lib/private/Activity/Manager.php b/lib/private/Activity/Manager.php
index 2dfc5c2609769..cccae70c23642 100644
--- a/lib/private/Activity/Manager.php
+++ b/lib/private/Activity/Manager.php
@@ -32,7 +32,7 @@ class Manager implements IManager {
 	/** @var string */
 	protected $formattingObjectType;
 
-	/** @var int */
+	/** @var int|string */
 	protected $formattingObjectId;
 
 	/** @var bool */
diff --git a/lib/public/Activity/IManager.php b/lib/public/Activity/IManager.php
index d638b8b2c6b23..37377da8a4a46 100644
--- a/lib/public/Activity/IManager.php
+++ b/lib/public/Activity/IManager.php
@@ -132,10 +132,10 @@ public function getSettingById(string $id): ActivitySettings;
 
 	/**
 	 * @param string $type
-	 * @param int $id
+	 * @param int|string $id
 	 * @since 8.2.0
 	 */
-	public function setFormattingObject(string $type, int $id): void;
+	public function setFormattingObject(string $type, int|string $id): void;
 
 	/**
 	 * @return bool