diff --git a/apps/files_sharing/lib/external/storage.php b/apps/files_sharing/lib/external/storage.php
index 783eea43c62efa473ce38b9c548f511003addcb1..ba7fba654a950c2e8e4941840578cf0a8967d803 100644
--- a/apps/files_sharing/lib/external/storage.php
+++ b/apps/files_sharing/lib/external/storage.php
@@ -252,6 +252,9 @@ class Storage extends DAV implements ISharedStorage {
 			if ($e->getCode() === 401 || $e->getCode() === 403) {
 				throw new ForbiddenException();
 			}
+			if ($e->getCode() === 404) {
+				throw new NotFoundException();
+			}
 			// throw this to be on the safe side: the share will still be visible
 			// in the UI in case the failure is intermittent, and the user will
 			// be able to decide whether to remove it if it's really gone