diff --git a/chrome/content/zotero/xpcom/sync/syncLocal.js b/chrome/content/zotero/xpcom/sync/syncLocal.js
index 8edc0784d..15ce16b89 100644
--- a/chrome/content/zotero/xpcom/sync/syncLocal.js
+++ b/chrome/content/zotero/xpcom/sync/syncLocal.js
@@ -249,7 +249,7 @@ Zotero.Sync.Data.Local = {
 	
 	_libraryHasUnsyncedFiles: Zotero.Promise.coroutine(function* (libraryID) {
 		yield Zotero.Sync.Storage.Local.checkForUpdatedFiles(libraryID);
-		return !!(yield Zotero.Sync.Storage.Local.getFilesToUpload(libraryID));
+		return !!(yield Zotero.Sync.Storage.Local.getFilesToUpload(libraryID)).length;
 	}),