diff --git a/src/ByteBeatCompiler.js b/src/ByteBeatCompiler.js
index 27971b0..f99791a 100644
--- a/src/ByteBeatCompiler.js
+++ b/src/ByteBeatCompiler.js
@@ -244,7 +244,9 @@ export default class ByteBeatCompiler {
   }
 
   static s_fnHeader = (function() {
-    const keys = {};
+    const keys = {
+      import: true,
+    };
     const windowKeep = new Set([
       'parseInt',
       'parseFloat',