diff --git a/apps/oauth2/lib/Db/AccessTokenMapper.php b/apps/oauth2/lib/Db/AccessTokenMapper.php
index a748159a75..79c1ecefd9 100644
--- a/apps/oauth2/lib/Db/AccessTokenMapper.php
+++ b/apps/oauth2/lib/Db/AccessTokenMapper.php
@@ -34,6 +34,9 @@ use OCP\AppFramework\Db\QBMapper;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 
+/**
+ * @template-extends QBMapper<AccessToken>
+ */
 class AccessTokenMapper extends QBMapper {
 
 	/**
@@ -74,6 +77,6 @@ class AccessTokenMapper extends QBMapper {
 		$qb
 			->delete($this->tableName)
 			->where($qb->expr()->eq('client_id', $qb->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
-		$qb->execute();
+		$qb->executeUpdate();
 	}
 }
diff --git a/apps/oauth2/lib/Db/ClientMapper.php b/apps/oauth2/lib/Db/ClientMapper.php
index 85c99e80a5..787d926d0a 100644
--- a/apps/oauth2/lib/Db/ClientMapper.php
+++ b/apps/oauth2/lib/Db/ClientMapper.php
@@ -34,6 +34,9 @@ use OCP\AppFramework\Db\QBMapper;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 
+/**
+ * @template-extends QBMapper<Client>
+ */
 class ClientMapper extends QBMapper {
 
 	/**