diff --git a/lib/keywords/validation.js b/lib/keywords/validation.js
index dcd148a..06f34e8 100644
--- a/lib/keywords/validation.js
+++ b/lib/keywords/validation.js
@@ -56,7 +56,7 @@ const lastKeywords = new Set([
   "https://json-schema.org/keyword/unevaluatedProperties",
   "https://json-schema.org/keyword/unevaluatedItems"
 ]);
-const keywordComparator = (_a, b) => lastKeywords.has(b[0]) ? -1 : 1;
+const keywordComparator = (a, b) => lastKeywords.has(a[0]) - lastKeywords.has(b[0]);
 
 const interpret = (url, instance, context) => {
   let valid = true;