diff --git a/eslint/babel-eslint-parser/src/visitor-keys.js b/eslint/babel-eslint-parser/src/visitor-keys.js
index 9cc7f0c315..abf0c1b515 100644
--- a/eslint/babel-eslint-parser/src/visitor-keys.js
+++ b/eslint/babel-eslint-parser/src/visitor-keys.js
@@ -19,4 +19,4 @@ export const conflictTypes = {
   ExportAllDeclaration: ESLINT_VISITOR_KEYS.ExportAllDeclaration,
 };
 
-export default Object.assign(newTypes, t.VISITOR_KEYS, conflictTypes);
+export default { ...newTypes, ...t.VISITOR_KEYS, ...conflictTypes };