diff --git a/chrome/content/zotero/xpcom/data/dataObjects.js b/chrome/content/zotero/xpcom/data/dataObjects.js
index 1b399ca9d..a95f9cf25 100644
--- a/chrome/content/zotero/xpcom/data/dataObjects.js
+++ b/chrome/content/zotero/xpcom/data/dataObjects.js
@@ -177,8 +177,8 @@ Zotero.DataObjects.prototype.getAsync = Zotero.Promise.coroutine(function* (ids,
 			toReturn.push(this._objectCache[id]);
 		}
 		else {
-			if (!ids.every(id => Number.isInteger(id))) {
-				throw new Error(`Invalid ${this._ZDO_object} ID '${id}'`);
+			if (!Number.isInteger(id)) {
+				throw new Error(`Invalid ${this._ZDO_object} ID '${id}' (${typeof id})`);
 			}
 			toLoad.push(id);
 		}
diff --git a/test/tests/dataObjectsTest.js b/test/tests/dataObjectsTest.js
index 448d51cb8..3cf9397ab 100644
--- a/test/tests/dataObjectsTest.js
+++ b/test/tests/dataObjectsTest.js
@@ -9,6 +9,14 @@ describe("Zotero.DataObjects", function () {
 		});
 	});
 	
+	describe("#getAsync()", function () {
+		it("show throw if passed an invalid id", function* () {
+			var e = yield getPromiseError(Zotero.Items.getAsync("[Object]"));
+			assert.ok(e);
+			assert.include(e.message, '(string)');
+		});
+	});
+	
 	describe("#getLibraryAndKeyFromID()", function () {
 		it("should return a libraryID and key within a transaction", function* () {
 			for (let type of types) {