diff --git a/lib/Db/GroupFoldersGroupsMapper.php b/lib/Db/GroupFoldersGroupsMapper.php
index 9f7635eb7..790968f41 100644
--- a/lib/Db/GroupFoldersGroupsMapper.php
+++ b/lib/Db/GroupFoldersGroupsMapper.php
@@ -60,8 +60,8 @@ public function getSpacenamesGroupIds() {
 					'gf_groups.folder_id'
 				)
 			)
-			->where('group_id not like "SPACE-GE%"')
-			->andWhere('group_id not like "SPACE-U%"');
+			->where('group_id not like \'SPACE-GE%\'')
+			->andWhere('group_id not like \'SPACE-U%\'');
 
 		return $qb->executeQuery()->fetchAll();
 	}