diff --git a/sanic/response.py b/sanic/response.py
index f4e24e99..d5b2beae 100644
--- a/sanic/response.py
+++ b/sanic/response.py
@@ -97,9 +97,10 @@ class HTTPResponse:
         headers = b''
         if self.headers:
             headers = b''.join(
-                b'%b: %b\r\n' % (name.encode(), str(value).encode('utf-8'))
-                if type(value) != Cookie else
                 b'%b: %b\r\n' % (name.encode(), value.encode('utf-8'))
+                if isinstance(value, str) or isinstance(value, Cookie)
+                else b'%b: %b\r\n' % (name.encode(),
+                                      str(value).encode('utf-8'))
                 for name, value in self.headers.items()
             )