diff --git a/chrome/content/zotero/xpcom/data/dataObjects.js b/chrome/content/zotero/xpcom/data/dataObjects.js
index 624e705188..7426e453bf 100644
--- a/chrome/content/zotero/xpcom/data/dataObjects.js
+++ b/chrome/content/zotero/xpcom/data/dataObjects.js
@@ -177,6 +177,9 @@ 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}'`);
+			}
 			toLoad.push(id);
 		}
 	}