diff --git a/sources/application/UI/Base/Layout/ActivityPanel/ActivityEntry/ActivityEntry.php b/sources/application/UI/Base/Layout/ActivityPanel/ActivityEntry/ActivityEntry.php
index fd35e4a4d..a4c917ffa 100644
--- a/sources/application/UI/Base/Layout/ActivityPanel/ActivityEntry/ActivityEntry.php
+++ b/sources/application/UI/Base/Layout/ActivityPanel/ActivityEntry/ActivityEntry.php
@@ -275,9 +275,9 @@ class ActivityEntry extends UIBlock
 	/**
 	 * Return true if the current user is the author of the activity entry
 	 *
-	 * @return bool
+	 * @return bool|null Can be null depending on the source of creation of the entry
 	 */
-	public function IsFromCurrentUser(): bool
+	public function IsFromCurrentUser(): ?bool
 	{
 		return $this->bIsFromCurrentUser;
 	}