diff --git a/apps/files_sharing/lib/External/Manager.php b/apps/files_sharing/lib/External/Manager.php
index 0a57324c32f..d857d7dcd51 100644
--- a/apps/files_sharing/lib/External/Manager.php
+++ b/apps/files_sharing/lib/External/Manager.php
@@ -193,6 +193,7 @@ class Manager {
 		$share = $this->getShare($id);
 
 		if ($share) {
+			\OC_Util::setupFS($this->uid);
 			$mountPoint = Files::buildNotExistingFileName('/', $share['name']);
 			$mountPoint = Filesystem::normalizePath('/' . $mountPoint);
 			$hash = md5($mountPoint);