diff --git a/core/ajax/share.php b/core/ajax/share.php
index 9b282b2b94ae15a6a8900b8b875f261b6ddba468..ed9cbfd109a3513a4b744252a19c2394939141ca 100644
--- a/core/ajax/share.php
+++ b/core/ajax/share.php
@@ -104,7 +104,7 @@ if (isset($_POST['action']) && isset($_POST['itemType']) && isset($_POST['itemSo
 			}
 
 			// don't send a mail to the user who shared the file
-			array_diff($recipientList, [\OCP\User::getUser()]);
+			$recipientList = array_diff($recipientList, [\OCP\User::getUser()]);
 
 			// send mail to all recipients with an email address
 			foreach ($recipientList as $recipient) {