From 4fa7070a310f2fbf1dab8e52c4643b0064cfae2b Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Tue, 31 Aug 2021 06:53:47 -0400
Subject: [PATCH] Fix item tree sorting when column doesn't have .sortDirection
 property

---
 chrome/content/zotero/itemTree.jsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chrome/content/zotero/itemTree.jsx b/chrome/content/zotero/itemTree.jsx
index 5b61aa80cc..03ab4567e1 100644
--- a/chrome/content/zotero/itemTree.jsx
+++ b/chrome/content/zotero/itemTree.jsx
@@ -1762,7 +1762,7 @@ var ItemTree = class ItemTree extends LibraryTree {
 		for (const field of sortFields) {
 			const col = columns.find(c => c.dataKey == field);
 			if (col) {
-				return col.sortDirection;
+				return col.sortDirection || 1;
 			}
 		}
 		return 1;