diff --git a/lib/private/Files/FileInfo.php b/lib/private/Files/FileInfo.php
index 213ee4ceec6..10c145407be 100644
--- a/lib/private/Files/FileInfo.php
+++ b/lib/private/Files/FileInfo.php
@@ -368,7 +368,7 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 * @inheritdoc
 	 */
 	public function getChecksum() {
-		return $this->data['checksum'];
+		return return $this->data['checksum'] ?? '';
 	}
 
 	public function getExtension(): string {