diff --git a/lib/6to5/index.js b/lib/6to5/index.js
index d60d457322..b9f6c6604c 100644
--- a/lib/6to5/index.js
+++ b/lib/6to5/index.js
@@ -7,7 +7,7 @@ exports.Transformer = require("./transformation/transformer");
 
 exports.types = require("./types");
 
-exports.runtime = require("./runtime");
+exports.runtime = require("./runtime-generator");
 
 exports.register = function (opts) {
   var register = require("./register");
diff --git a/lib/6to5/runtime.js b/lib/6to5/runtime-generator.js
similarity index 100%
rename from lib/6to5/runtime.js
rename to lib/6to5/runtime-generator.js
diff --git a/test/runtime.js b/test/runtime.js
index 9a898499d8..eac6e36615 100644
--- a/test/runtime.js
+++ b/test/runtime.js
@@ -1,4 +1,4 @@
-var runtime = require("../lib/6to5/runtime");
+var runtime = require("../lib/6to5/runtime-generator");
 var assert  = require("assert");
 
 suite("runtime", function () {