diff --git a/chrome/content/zotero/itemTree.jsx b/chrome/content/zotero/itemTree.jsx
index 84c70d6507..b16a1a3965 100644
--- a/chrome/content/zotero/itemTree.jsx
+++ b/chrome/content/zotero/itemTree.jsx
@@ -2403,8 +2403,8 @@ var ItemTree = class ItemTree extends LibraryTree {
 		row.numNotes = treeRow.numNotes() || "";
 		row.feed = (treeRow.ref.isFeedItem && Zotero.Feeds.get(treeRow.ref.libraryID).name) || "";
 		row.lastRead = row.isItem ? treeRow.ref.getItemLastRead() : "";
-		row.addedBy = row.isItem && treeRow.getAddedBy();
-		row.lastModifiedBy = row.isItem && treeRow.getLastModifiedBy();
+		row.addedBy = row.isItem ? treeRow.getAddedBy() : "";
+		row.lastModifiedBy = row.isItem ? treeRow.getLastModifiedBy() : "";
 		row.title = treeRow.getDisplayTitle();
 		
 		const columns = this.getColumns();
diff --git a/test/tests/collectionViewItemTreeTest.js b/test/tests/collectionViewItemTreeTest.js
index 817b525c38..889b5dfc5a 100644
--- a/test/tests/collectionViewItemTreeTest.js
+++ b/test/tests/collectionViewItemTreeTest.js
@@ -1989,6 +1989,20 @@ describe("CollectionViewItemTree", function () {
 				assert.equal(itemsView.getRow(searchRowIndex).type, 'search');
 			});
 
+			it("shouldn't show a value in Added By/Modified By for trashed collections and searches", async function () {
+				let collection = await createDataObject('collection', { deleted: true });
+				let search = await createDataObject('search', { deleted: true });
+
+				await selectTrash(win);
+
+				for (let obj of [collection, search]) {
+					let row = itemsView.getRowIndexByID(obj.treeViewID);
+					assert.isNumber(row);
+					assert.strictEqual(itemsView.getCellText(row, 'addedBy'), "");
+					assert.strictEqual(itemsView.getCellText(row, 'lastModifiedBy'), "");
+				}
+			});
+
 			it("shouldn't show trashed collections or searches when an advanced search is active", async function () {
 				let item = await createDataObject('item', { title: "advancedTrashMatch", deleted: true });
 				let collection = await createDataObject('collection', { name: "advancedTrashMatch", deleted: true });