diff --git a/lib/6to5/templates/tagged-template-literal.js b/lib/6to5/templates/tagged-template-literal.js
index a1735f0fc7..5a3a997307 100644
--- a/lib/6to5/templates/tagged-template-literal.js
+++ b/lib/6to5/templates/tagged-template-literal.js
@@ -1,4 +1,6 @@
 (function (strings, raw) {
-  return Object.freeze(Object.defineProperties(strings, { raw: { value: raw } }));
+  return Object.freeze(Object.defineProperties(strings, {
+      raw: { value: Object.freeze(raw) }
+  }));
 });
 
diff --git a/test/fixtures/transformation/es6-template-literals/tag/expected.js b/test/fixtures/transformation/es6-template-literals/tag/expected.js
index 6d6de74206..c4b5cb6cbb 100644
--- a/test/fixtures/transformation/es6-template-literals/tag/expected.js
+++ b/test/fixtures/transformation/es6-template-literals/tag/expected.js
@@ -3,7 +3,7 @@
 var _taggedTemplateLiteral = function (strings, raw) {
   return Object.freeze(Object.defineProperties(strings, {
     raw: {
-      value: raw
+      value: Object.freeze(raw)
     }
   }));
 };