diff --git a/src/helpers/get-property-in-chain.js b/src/helpers/get-property-in-chain.js
index 88123f6c..ffe90ef0 100644
--- a/src/helpers/get-property-in-chain.js
+++ b/src/helpers/get-property-in-chain.js
@@ -24,14 +24,13 @@ export function getPropertyInChain(base, chain) {
     const prop = chain.slice(0, pos);
 
     // https://github.com/AdguardTeam/Scriptlets/issues/128
-    let nextBase = null;
     if (base === null) {
         // if base is null, return 'null' as base.
         // it's needed for triggering the reason logging while debugging
-        return { base: nextBase, prop, chain };
+        return { base, prop, chain };
     }
 
-    nextBase = base[prop];
+    const nextBase = base[prop];
     chain = chain.slice(pos + 1);
     if (nextBase !== undefined) {
         return getPropertyInChain(nextBase, chain);