diff --git a/apps/files_sharing/appinfo/update.php b/apps/files_sharing/appinfo/update.php
index 23f2afea7e13617388349f2a279b72da7e8c97ff..e75c538b1502a5d1196d60e62b36084e3707956b 100644
--- a/apps/files_sharing/appinfo/update.php
+++ b/apps/files_sharing/appinfo/update.php
@@ -55,6 +55,7 @@ if (version_compare($installedVersion, '0.3', '<')) {
 			OC_Util::tearDownFS();
 		}
 	}
+	OC_User::setUserId(null);
 	if ($update_error) {
 		OCP\Util::writeLog('files_sharing', 'There were some problems upgrading the sharing of files', OCP\Util::ERROR);
 	}