diff --git a/chrome/content/zotero/createParentDialog.js b/chrome/content/zotero/createParentDialog.js
index 2253f7da05..47f6e47f93 100644
--- a/chrome/content/zotero/createParentDialog.js
+++ b/chrome/content/zotero/createParentDialog.js
@@ -68,7 +68,7 @@ async function doAccept() {
 	);
 
 	// If we successfully created a parent, return it
-	if (newItems) {
+	if (newItems.length) {
 		io.dataOut = { parent: newItems[0] };
 		window.close();
 	}
diff --git a/chrome/content/zotero/lookup.js b/chrome/content/zotero/lookup.js
index 60a563a1f1..02fb828935 100644
--- a/chrome/content/zotero/lookup.js
+++ b/chrome/content/zotero/lookup.js
@@ -40,7 +40,7 @@ var Zotero_Lookup = new function () {
 	 * @param textBox {HTMLElement} - Textbox containing identifiers
 	 * @param childItem {Zotero.Item|false} - Child item (optional)
 	 * @param toggleProgress {function} - Callback to toggle progress on/off
-	 * @returns {Promise<boolean>}
+	 * @returns {Promise<Zotero.Item[]>}
 	 */
 	this.addItemsFromIdentifier = async function (textBox, childItem, toggleProgress) {
 		var identifiers = Zotero.Utilities.extractIdentifiers(textBox.value);
@@ -79,11 +79,11 @@ var Zotero_Lookup = new function () {
 			}
 		}
 
-		let newItems = false;
 		toggleProgress(true);
 
-		await Zotero.Promise.all(identifiers.map(async (identifier) => {
-			var translate = new Zotero.Translate.Search();
+		let newItems = [];
+		for (let identifier of identifiers) {
+			let translate = new Zotero.Translate.Search();
 			translate.setIdentifier(identifier);
 
 			// be lenient about translators
@@ -91,20 +91,20 @@ var Zotero_Lookup = new function () {
 			translate.setTranslator(translators);
 
 			try {
-				newItems = await translate.translate({
+				newItems.push(...await translate.translate({
 					libraryID,
 					collections,
 					saveAttachments: !childItem
-				});
+				}));
 			}
 			// Continue with other ids on failure
 			catch (e) {
 				Zotero.logError(e);
 			}
-		}));
+		}
 
 		toggleProgress(false);
-		if (!newItems) {
+		if (!newItems.length) {
 			Zotero.alert(
 				window,
 				Zotero.getString("lookup.failure.title"),
@@ -126,7 +126,7 @@ var Zotero_Lookup = new function () {
 			on => Zotero_Lookup.toggleProgress(on)
 		);
 
-		if (newItems) {
+		if (newItems.length) {
 			document.getElementById("zotero-lookup-panel").hidePopup();
 		}
 		return false;