diff --git a/src/core/curlify.js b/src/core/curlify.js
index 2564ed92..328830c1 100644
--- a/src/core/curlify.js
+++ b/src/core/curlify.js
@@ -20,7 +20,7 @@ export default function curl( request ){
   if ( request.get("body") ){
 
     if(type === "multipart/form-data" && request.get("method") === "POST") {
-      for( let [ k,v ] of request.get("body").values()) {
+      for( let [ k,v ] of request.get("body").entrySeq()) {
         curlified.push( "-F" )
         if (v instanceof win.File) {
           curlified.push( `"${k}=@${v.name};type=${v.type}"` )