diff --git a/src/ByteBeatCompiler.js b/src/ByteBeatCompiler.js
index f99791a..e916233 100644
--- a/src/ByteBeatCompiler.js
+++ b/src/ByteBeatCompiler.js
@@ -245,7 +245,7 @@ export default class ByteBeatCompiler {
 
   static s_fnHeader = (function() {
     const keys = {
-      import: true,
+      'import': true,
     };
     const windowKeep = new Set([
       'parseInt',