diff --git a/lib/private/Files/Utils/Scanner.php b/lib/private/Files/Utils/Scanner.php
index 0c0fe7a0ebf..476448f99c5 100644
--- a/lib/private/Files/Utils/Scanner.php
+++ b/lib/private/Files/Utils/Scanner.php
@@ -147,6 +147,7 @@ class Scanner extends PublicEmitter {
 					continue;
 				}
 
+				/** @var \OC\Files\Cache\Scanner $scanner */
 				$scanner = $storage->getScanner();
 				$this->attachListener($mount);
 
@@ -226,6 +227,7 @@ class Scanner extends PublicEmitter {
 				continue;
 			}
 			$relativePath = $mount->getInternalPath($dir);
+			/** @var \OC\Files\Cache\Scanner $scanner */
 			$scanner = $storage->getScanner();
 			$scanner->setUseTransactions(false);
 			$this->attachListener($mount);