diff --git a/lib/private/Repair/RepairInvalidShares.php b/lib/private/Repair/RepairInvalidShares.php
index e0f6604978..04624c910d 100644
--- a/lib/private/Repair/RepairInvalidShares.php
+++ b/lib/private/Repair/RepairInvalidShares.php
@@ -99,16 +99,7 @@ class RepairInvalidShares implements IRepairStep {
 		$mask = \OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_SHARE;
 		$builder = $this->connection->getQueryBuilder();
 
-
-		if ($this->connection->getDatabasePlatform() instanceof OraclePlatform) {
-			$permsFunc = $builder->createFunction(
-				'bitand(' . $builder->getColumnName('permissions') . ', ' . $mask . ')'
-			);
-		} else {
-			$permsFunc = $builder->createFunction(
-				'(' . $builder->getColumnName('permissions') . ' & ' . $mask . ')'
-			);
-		}
+		$permsFunc = $builder->expr()->bitwiseAnd('permissions', $mask);
 		$builder
 			->update('share')
 			->set('permissions', $permsFunc)