4 files changed, 4 insertions, 4 deletions
diff --git a/apps/files_external/lib/Lib/Backend/InvalidBackend.php b/apps/files_external/lib/Lib/Backend/InvalidBackend.php
index 3a535577447..f9a0fd040ed 100644
--- a/apps/files_external/lib/Lib/Backend/InvalidBackend.php
+++ b/apps/files_external/lib/Lib/Backend/InvalidBackend.php
@@ -60,7 +60,7 @@ class InvalidBackend extends Backend {
 		return $this->invalidId;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$storage->setBackendOption('exception', new \Exception('Unknown storage backend "' . $this->invalidId . '"', StorageNotAvailableException::STATUS_ERROR));
 	}
 }
diff --git a/apps/files_external/lib/Lib/Backend/Local.php b/apps/files_external/lib/Lib/Backend/Local.php
index bd15cb46127..41b8e2fbad7 100644
--- a/apps/files_external/lib/Lib/Backend/Local.php
+++ b/apps/files_external/lib/Lib/Backend/Local.php
@@ -48,7 +48,7 @@ class Local extends Backend {
 		;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null): void {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null): void {
 		$storage->setBackendOption('isExternal', true);
 	}
 }
diff --git a/apps/files_external/lib/Lib/Backend/SMB.php b/apps/files_external/lib/Lib/Backend/SMB.php
index 9ac10025ea0..7fa2f3ae67a 100644
--- a/apps/files_external/lib/Lib/Backend/SMB.php
+++ b/apps/files_external/lib/Lib/Backend/SMB.php
@@ -77,7 +77,7 @@ class SMB extends Backend {
 			->setLegacyAuthMechanism($legacyAuth);
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$auth = $storage->getAuthMechanism();
 		if ($auth->getScheme() === AuthMechanism::SCHEME_PASSWORD) {
 			if (!is_string($storage->getBackendOption('user')) || !is_string($storage->getBackendOption('password'))) {
diff --git a/apps/files_external/lib/Lib/Backend/SMB_OC.php b/apps/files_external/lib/Lib/Backend/SMB_OC.php
index 35743c5bc3b..33cb80c2bb5 100644
--- a/apps/files_external/lib/Lib/Backend/SMB_OC.php
+++ b/apps/files_external/lib/Lib/Backend/SMB_OC.php
@@ -60,7 +60,7 @@ class SMB_OC extends Backend {
 		;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$username_as_share = ($storage->getBackendOption('username_as_share') === true);
 
 		if ($username_as_share) {