diff --git a/lib/public/Share/IShare.php b/lib/public/Share/IShare.php
index 40548c6c73d2f..e5a943b0bac89 100644
--- a/lib/public/Share/IShare.php
+++ b/lib/public/Share/IShare.php
@@ -394,7 +394,7 @@ public function setExpirationDate($expireDate);
 	/**
 	 * Get the expiration date
 	 *
-	 * @return \DateTime
+	 * @return null|\DateTime
 	 * @since 9.0.0
 	 */
 	public function getExpirationDate();