diff --git a/lib/private/Files/Utils/Scanner.php b/lib/private/Files/Utils/Scanner.php
index f5e9cda29882e..1536878ad7f1e 100644
--- a/lib/private/Files/Utils/Scanner.php
+++ b/lib/private/Files/Utils/Scanner.php
@@ -170,6 +170,7 @@ public function backgroundScan($dir) {
 					continue;
 				}
 
+				/** @var \OC\Files\Cache\Scanner $scanner */
 				$scanner = $storage->getScanner();
 				$this->attachListener($mount);
 
@@ -249,6 +250,7 @@ public function scan($dir = '', $recursive = \OC\Files\Cache\Scanner::SCAN_RECUR
 				continue;
 			}
 			$relativePath = $mount->getInternalPath($dir);
+			/** @var \OC\Files\Cache\Scanner $scanner */
 			$scanner = $storage->getScanner();
 			$scanner->setUseTransactions(false);
 			$this->attachListener($mount);