diff --git a/config/helpers/is_eslint.js b/config/helpers/is_eslint.js
index 5dfb7e533e4d71ac412504126dded7b5e7d947d9..55ec42e68c1d32bf9c4bb6f48767db9bb9b2d145 100644
--- a/config/helpers/is_eslint.js
+++ b/config/helpers/is_eslint.js
@@ -5,7 +5,7 @@ const isESLint = mod => {
   let parent = mod.parent;
 
   while (parent) {
-    if (parent.filename.includes('/eslint')) {
+    if (parent.filename && parent.filename.includes('/eslint')) {
       return true;
     }