diff --git a/lib/private/Repair.php b/lib/private/Repair.php
index 9ca3ece6dd493..30240dfb60b70 100644
--- a/lib/private/Repair.php
+++ b/lib/private/Repair.php
@@ -83,6 +83,7 @@
 use OC\Repair\RepairDavShares;
 use OC\Repair\RepairInvalidShares;
 use OC\Repair\RepairMimeTypes;
+use OC\Repair\RepairUnencryptedSize;
 use OC\Repair\SqliteAutoincrement;
 use OC\Template\JSCombiner;
 use Psr\Log\LoggerInterface;
@@ -176,6 +177,7 @@ public static function getRepairSteps(): array {
 		return [
 			new Collation(\OC::$server->getConfig(), \OC::$server->get(LoggerInterface::class), \OC::$server->getDatabaseConnection(), false),
 			new RepairMimeTypes(\OC::$server->getConfig(), \OC::$server->getDatabaseConnection()),
+			new RepairUnencryptedSize(\OC::$server->getDatabaseConnection()),
 			new CleanTags(\OC::$server->getDatabaseConnection(), \OC::$server->getUserManager()),
 			new RepairInvalidShares(\OC::$server->getConfig(), \OC::$server->getDatabaseConnection()),
 			new MoveUpdaterStepFile(\OC::$server->getConfig()),
diff --git a/lib/private/Repair/RepairUnencryptedSize.php b/lib/private/Repair/RepairUnencryptedSize.php
new file mode 100644
index 0000000000000..08f4455a7d2d7
--- /dev/null
+++ b/lib/private/Repair/RepairUnencryptedSize.php
@@ -0,0 +1,55 @@
+<?php
+/**
+ * @copyright Copyright (c) 2023, Nextcloud GmbH.
+ *
+ * @author Simon Spannagel <simonspa@kth.se>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair;
+
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
+
+class RepairUnencryptedSize implements IRepairStep {
+	/** @var IDBConnection */
+	protected $connection;
+
+	public function __construct(IDBConnection $connection) {
+		$this->connection = $connection;
+	}
+
+	public function getName() {
+		return 'Repair file size of unencrypted files';
+	}
+
+	/**
+	 * Fix unencrypted file size
+	 */
+	public function run(IOutput $output) {
+		$update = $this->connection->getQueryBuilder();
+		$update->update('filecache')
+			->set('unencrypted_size', "0")
+			->where($update->expr()->gt('unencrypted_size', "0", IQueryBuilder::PARAM_INT))
+			->andWhere($update->expr()->eq('encrypted', "0", IQueryBuilder::PARAM_INT));
+
+		if ($update->execute()) {
+			$output->info('Fixed file size of unencrypted files');
+		}
+	}
+}