diff --git a/packages/babel-preset-env/src/index.js b/packages/babel-preset-env/src/index.js
index 48e94b860355..08fe2a6afa09 100644
--- a/packages/babel-preset-env/src/index.js
+++ b/packages/babel-preset-env/src/index.js
@@ -161,8 +161,8 @@ const removeUnnecessaryItems = (
   overlapping: Map<string, Set<string>>,
 ) => {
   items.forEach(item => {
-    if (!overlapping.has(item)) return;
-    overlapping.get(item).forEach(name => items.delete(name));
+    const names = overlapping.get(item);
+    if (names) names.forEach(name => items.delete(name));
   });
 };