diff --git a/chrome/content/zotero/xpcom/utilities_translate.js b/chrome/content/zotero/xpcom/utilities_translate.js
index 5a7935f74c..923a7d49f5 100644
--- a/chrome/content/zotero/xpcom/utilities_translate.js
+++ b/chrome/content/zotero/xpcom/utilities_translate.js
@@ -242,7 +242,7 @@ Zotero.Utilities.Translate.prototype.processDocuments = function(urls, processor
 	}
 	
 	for(var i=0; i<urls.length; i++) {
-		if("document" in this._translate && "location" in this._translate.document
+		if(this._translate.document && this._translate.document.location
 				&& this._translate.document.location.toString() === urls[i]) {
 			// Document is attempting to reload itself
 			Zotero.debug("Translate: Attempted to load the current document using processDocuments; using loaded document instead");