diff --git a/chrome/content/zotero/xpcom/data/library.js b/chrome/content/zotero/xpcom/data/library.js
index 5fa44f3635..66cab2750a 100644
--- a/chrome/content/zotero/xpcom/data/library.js
+++ b/chrome/content/zotero/xpcom/data/library.js
@@ -481,7 +481,7 @@ Zotero.Library.prototype.save = async function (options) {
 	}
 };
 
-Zotero.Library.prototype._initSave = function (env) {
+Zotero.Library.prototype._initSave = async function (env) {
 	if (this._libraryID === undefined) {
 		env.isNew = true;
 		
@@ -742,4 +742,4 @@ Zotero.Library.prototype.hasItem = function (item) {
 		throw new Error("item must be a Zotero.Item");
 	}
 	return item.libraryID == this.libraryID;
-}
\ No newline at end of file
+}