diff --git a/apps/files_sharing/lib/External/Manager.php b/apps/files_sharing/lib/External/Manager.php
index a3b037e498..6a036b663d 100644
--- a/apps/files_sharing/lib/External/Manager.php
+++ b/apps/files_sharing/lib/External/Manager.php
@@ -636,7 +636,7 @@ class Manager {
 
 		$query = 'SELECT `id`, `remote`, `remote_id`, `share_token`, `name`, `owner`, `user`, `mountpoint`, `accepted`
 		          FROM `*PREFIX*share_external` 
-				  WHERE `user` = ? OR `user` IN (?)';
+				  WHERE (`user` = ? OR `user` IN (?))';
 		$parameters = [$this->uid, implode(',',$userGroups)];
 		if (!is_null($accepted)) {
 			$query .= ' AND `accepted` = ?';
diff --git a/apps/files_sharing/tests/External/ManagerTest.php b/apps/files_sharing/tests/External/ManagerTest.php
index 753836dd58..93c17ca10c 100644
--- a/apps/files_sharing/tests/External/ManagerTest.php
+++ b/apps/files_sharing/tests/External/ManagerTest.php
@@ -138,6 +138,9 @@ class ManagerTest extends TestCase {
 		$shareData3 = $shareData1;
 		$shareData3['token'] = 'token3';
 
+		$this->userManager->expects($this->any())->method('get')->willReturn($this->user);
+		$this->groupManager->expects($this->any())->method(('getUserGroups'))->willReturn([]);
+
 		$this->manager->expects($this->at(0))->method('tryOCMEndPoint')->with('http://localhost', 'token1', -1, 'accept')->willReturn(false);
 		$this->manager->expects($this->at(1))->method('tryOCMEndPoint')->with('http://localhost', 'token3', -1, 'decline')->willReturn(false);