diff --git a/lib/6to5/generation/index.js b/lib/6to5/generation/index.js
index cc524f3e62..98cbeed05a 100644
--- a/lib/6to5/generation/index.js
+++ b/lib/6to5/generation/index.js
@@ -42,8 +42,8 @@ each(Buffer.prototype, function (fn, key) {
 CodeGenerator.normaliseOptions = function (code, opts) {
   var style = "  ";
   if (code) {
-    style = detectIndent(code).indent;
-    if (style && style !== " ") style = "  ";
+    var indent = detectIndent(code).indent;
+    if (indent && indent !== " ") style = indent;
   }
 
   return merge({