diff --git a/lib/Db/CollectedAddressMapper.php b/lib/Db/CollectedAddressMapper.php
index 786f781fe97cac26da937c8f25237be084995f14..db8635adc554395947115c6b0d28b183c19faeb0 100644
--- a/lib/Db/CollectedAddressMapper.php
+++ b/lib/Db/CollectedAddressMapper.php
@@ -63,6 +63,7 @@ class CollectedAddressMapper extends QBMapper {
 
 	/**
 	 * @param null|string $email
+	 * @return bool
 	 */
 	public function exists(string $userId, ?string $email) {
 		$qb = $this->db->getQueryBuilder();
@@ -82,7 +83,7 @@ class CollectedAddressMapper extends QBMapper {
 			->from($this->getTableName());
 		$result = $qb->execute();
 
-		$count = (int)$result->fetchColumn(0);
+		$count = (int)$result->fetchColumn();
 		$result->closeCursor();
 		return $count;
 	}
diff --git a/lib/Db/MessageMapper.php b/lib/Db/MessageMapper.php
index 0ff20f67069af99cc154ee0616b0b9567b68708f..56e510e442fae3da9504e9c47853543aff0124ee 100644
--- a/lib/Db/MessageMapper.php
+++ b/lib/Db/MessageMapper.php
@@ -96,7 +96,7 @@ class MessageMapper extends QBMapper {
 			->where($query->expr()->eq('mailbox_id', $query->createNamedParameter($mailbox->getId())));
 
 		$result = $query->execute();
-		$max = (int)$result->fetchColumn(0);
+		$max = (int)$result->fetchColumn();
 		$result->closeCursor();
 
 		if ($max === 0) {