diff --git a/lib/private/files/cache/scanner.php b/lib/private/files/cache/scanner.php
index 6cb9807f5a..1315d027c4 100644
--- a/lib/private/files/cache/scanner.php
+++ b/lib/private/files/cache/scanner.php
@@ -129,6 +129,7 @@ class Scanner extends BasicEmitter {
 						}
 						// only reuse data if the file hasn't explicitly changed
 						if (isset($data['storage_mtime']) && isset($cacheData['storage_mtime']) && $data['storage_mtime'] === $cacheData['storage_mtime']) {
+							$data['mtime'] = $cacheData['mtime'];
 							if (($reuseExisting & self::REUSE_SIZE) && ($data['size'] === -1)) {
 								$data['size'] = $cacheData['size'];
 							}