diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index fc5cb064a..eff33c522 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -99,8 +99,6 @@ Services.scriptloader.loadSubScript("resource://zotero/polyfill.js");
 	this.unlockPromise;
 	this.initializationDeferred;
 	this.initializationPromise;
-	this.objectInitializationDeferred;
-	this.objectInitializationPromise;
 	
 	this.hiDPISuffix = "";