diff --git a/lib/Db/BookmarkMapper.php b/lib/Db/BookmarkMapper.php
index 1f2bfd14e..e6f5b47b3 100644
--- a/lib/Db/BookmarkMapper.php
+++ b/lib/Db/BookmarkMapper.php
@@ -877,7 +877,7 @@ private function _getTagsColumn(IQueryBuilder $qb) : IQueryFunction {
 		if ($dbType === 'pgsql') {
 			$tagsCol = $qb->createFunction('array_to_string(array_agg(' . $qb->getColumnName('t.tag') . "), ',')");
 		} else {
-			$tagsCol = $qb->createFunction('IFNULL(GROUP_CONCAT(' . $qb->getColumnName('t.tag') . '), "")');
+			$tagsCol = $qb->createFunction('IFNULL(GROUP_CONCAT(' . $qb->getColumnName('t.tag') . "), '')");
 		}
 		return $tagsCol;
 	}