diff --git a/index.js b/index.js
index 3632c27..cf90561 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,7 @@
 "use strict";
 
 module.exports = function splitFilter(array, ensureCategories, predicate) {
-	let results = {};
+	let results = Object.create(null);
 
 	if (ensureCategories != null) {
 		for (let category of ensureCategories) {