diff --git a/packages/fastboot/src/fastboot-response.js b/packages/fastboot/src/fastboot-response.js
index 88b05071..3c6058ea 100644
--- a/packages/fastboot/src/fastboot-response.js
+++ b/packages/fastboot/src/fastboot-response.js
@@ -4,7 +4,9 @@ const FastBootHeaders = require('./fastboot-headers');
 
 class FastbootResponse {
   constructor(response) {
-    this.headers = new FastBootHeaders(response._headers);
+    this.headers = new FastBootHeaders(
+      typeof response.getHeaders === 'function' ? response.getHeaders() : response._headers
+    );
     this.statusCode = 200;
   }
 }
diff --git a/packages/fastboot/test/fastboot-response-test.js b/packages/fastboot/test/fastboot-response-test.js
index aa99f6ac..545cf860 100644
--- a/packages/fastboot/test/fastboot-response-test.js
+++ b/packages/fastboot/test/fastboot-response-test.js
@@ -7,9 +7,11 @@ describe('FastBootResponse', function() {
 
   beforeEach(function() {
     var mockResponse = {
-      _headers: {
-        'i-am-a': ['mock header', 'me too'],
-        cookie: '',
+      getHeaders() {
+        return {
+          'i-am-a': ['mock header', 'me too'],
+          cookie: '',
+        };
       },
     };
 
diff --git a/test-packages/integration-tests/test/basic-test.js b/test-packages/integration-tests/test/basic-test.js
index 20be1217..d8a8fea6 100644
--- a/test-packages/integration-tests/test/basic-test.js
+++ b/test-packages/integration-tests/test/basic-test.js
@@ -18,7 +18,11 @@ function dummyRequest() {
   };
 }
 function dummyResponse() {
-  return { _headers: {} };
+  return {
+    getHeaders() {
+      return {};
+    },
+  };
 }
 
 describe("FastBoot", function() {