diff --git a/apps/files_external/lib/Lib/Backend/SFTP.php b/apps/files_external/lib/Lib/Backend/SFTP.php
index c3625f97087ab..93a5d87a5ff15 100644
--- a/apps/files_external/lib/Lib/Backend/SFTP.php
+++ b/apps/files_external/lib/Lib/Backend/SFTP.php
@@ -20,6 +20,8 @@ public function __construct(IL10N $l, Password $legacyAuth) {
 			->setText($l->t('SFTP'))
 			->addParameters([
 				new DefinitionParameter('host', $l->t('Host')),
+				(new DefinitionParameter('port', $l->t('Port')))
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 				(new DefinitionParameter('root', $l->t('Root')))
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 			])