diff --git a/chrome/content/zotero/xpcom/data/tag.js b/chrome/content/zotero/xpcom/data/tag.js
index 4d95065d4..65e8d19a7 100644
--- a/chrome/content/zotero/xpcom/data/tag.js
+++ b/chrome/content/zotero/xpcom/data/tag.js
@@ -213,7 +213,7 @@ Zotero.Tag.prototype.save = function () {
 		this.type = 0;
 	}
 	
-	if (this.type !== 0 && this.type !== 1) {
+	if (this.type !== 0 && this.type != 1) {
 		throw ('Invalid tag type ' + this.type + ' in Zotero.Tag.save()');
 	}