diff --git a/lib/npm.js b/lib/npm.js
index f0a133d27a6aa..28acdbbdd6fd7 100644
--- a/lib/npm.js
+++ b/lib/npm.js
@@ -317,7 +317,7 @@ class Npm {
     })
 
     const { writeFileSync } = require('node:fs')
-    for (const [file, content] of error.files) {
+    for (const [file, content] of files) {
       const filePath = `${this.logPath}${file}`
       const fileContent = `'Log files:\n${this.logFiles.join('\n')}\n\n${content.trim()}\n`
       try {