diff --git a/lib/6to5/transformation/modules/amd.js b/lib/6to5/transformation/modules/amd.js
index f4d7713954..00d60a7077 100644
--- a/lib/6to5/transformation/modules/amd.js
+++ b/lib/6to5/transformation/modules/amd.js
@@ -82,8 +82,7 @@ AMDFormatter.prototype.importSpecifier = function (specifier, node, nodes) {
 
   if (contains(this.file.dynamicImported, node)) {
     // Prevent unnecessary renaming of dynamic imports.
-    this.ids[node.source.value] = key;
-    return;
+    this.ids[node.source.value] = ref;
   } else if (t.isImportBatchSpecifier(specifier)) {
     // import * as bar from "foo";
   } else if (t.isSpecifierDefault(specifier) && !this.noInteropRequire) {
diff --git a/test/fixtures/transformation/self-contained/runtime-amd/expected.js b/test/fixtures/transformation/self-contained/runtime-amd/expected.js
index 89885bdb66..169a62020f 100644
--- a/test/fixtures/transformation/self-contained/runtime-amd/expected.js
+++ b/test/fixtures/transformation/self-contained/runtime-amd/expected.js
@@ -1,5 +1,6 @@
-define(["exports", "someModule", "6to5-runtime/helpers"], function (exports, _someModule, _to5Helpers) {
+define(["exports", "someModule", "6to5-runtime/helpers"], function (exports, _someModule, _to5RuntimeHelpers) {
   "use strict";
 
+  var _to5Helpers = _to5RuntimeHelpers;
   var foo = _to5Helpers.interopRequire(_someModule);
 });