diff --git a/apps/dav/lib/CardDAV/CardDavBackend.php b/apps/dav/lib/CardDAV/CardDavBackend.php
index 71b7e846f3..7abfd64ed7 100644
--- a/apps/dav/lib/CardDAV/CardDavBackend.php
+++ b/apps/dav/lib/CardDAV/CardDavBackend.php
@@ -449,7 +449,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 */
 	public function deleteAddressBook($addressBookId) {
 		$query = $this->db->getQueryBuilder();
-		$query->delete('cards')
+		$query->delete($this->dbCardsTable)
 			->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
 			->setParameter('addressbookid', $addressBookId)
 			->execute();
@@ -493,7 +493,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	public function getCards($addressBookId) {
 		$query = $this->db->getQueryBuilder();
 		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
-			->from('cards')
+			->from($this->dbCardsTable)
 			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
 
 		$cards = [];
@@ -524,7 +524,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	public function getCard($addressBookId, $cardUri) {
 		$query = $this->db->getQueryBuilder();
 		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
-			->from('cards')
+			->from($this->dbCardsTable)
 			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
 			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
 			->setMaxResults(1);
@@ -562,7 +562,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 		$query = $this->db->getQueryBuilder();
 		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
-			->from('cards')
+			->from($this->dbCardsTable)
 			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
 			->andWhere($query->expr()->in('uri', $query->createParameter('uri')));
 
@@ -611,7 +611,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 		$q = $this->db->getQueryBuilder();
 		$q->select('uid')
-			->from('cards')
+			->from($this->dbCardsTable)
 			->where($q->expr()->eq('addressbookid', $q->createNamedParameter($addressBookId)))
 			->andWhere($q->expr()->eq('uid', $q->createNamedParameter($uid)))
 			->setMaxResults(1);
@@ -676,7 +676,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 		$uid = $this->getUID($cardData);
 		$etag = md5($cardData);
 		$query = $this->db->getQueryBuilder();
-		$query->update('cards')
+		$query->update($this->dbCardsTable)
 			->set('carddata', $query->createNamedParameter($cardData, IQueryBuilder::PARAM_LOB))
 			->set('lastmodified', $query->createNamedParameter(time()))
 			->set('size', $query->createNamedParameter(strlen($cardData)))
@@ -712,7 +712,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 			$cardId = null;
 		}
 		$query = $this->db->getQueryBuilder();
-		$ret = $query->delete('cards')
+		$ret = $query->delete($this->dbCardsTable)
 			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
 			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
 			->execute();