diff --git a/lib/processNested.js b/lib/processNested.js
index aeb9225..f6a8ff0 100644
--- a/lib/processNested.js
+++ b/lib/processNested.js
@@ -21,7 +21,8 @@ module.exports = function(data){
       let k = keyParts[index];
 
       // Ensure we don't allow prototype pollution
-      if (OBJECT_PROTOTYPE_KEYS.includes(k) || (ARRAY_PROTOTYPE_KEYS.includes(k) && Array.isArray(current))) {
+      const IN_ARRAY_PROTOTYPE = ARRAY_PROTOTYPE_KEYS.includes(k) && Array.isArray(current);
+      if (OBJECT_PROTOTYPE_KEYS.includes(k) || IN_ARRAY_PROTOTYPE) {
         continue;
       }