diff --git a/apps/files_sharing/lib/Controller/ShareAPIController.php b/apps/files_sharing/lib/Controller/ShareAPIController.php
index 9ae192ff5d6ec4620465cb5fa7e1584ef354c258..758244685590126c634892fdf7cafa7b494252b1 100644
--- a/apps/files_sharing/lib/Controller/ShareAPIController.php
+++ b/apps/files_sharing/lib/Controller/ShareAPIController.php
@@ -316,7 +316,7 @@ class ShareAPIController extends OCSController {
 		$result = \OC::$server->getContactsManager()->search($query, [$property]);
 		foreach ($result as $r) {
 			foreach ($r[$property] as $value) {
-				if ($value === $query) {
+				if ($value === $query && $r['FN']) {
 					return $r['FN'];
 				}
 			}