diff --git a/index.js b/index.js
index 2b886ae0..e5bf7a97 100644
--- a/index.js
+++ b/index.js
@@ -248,6 +248,10 @@ function session(options){
           end.call(res);
         });
 
+        if (res.statusCode == 301 || res.statusCode == 302) {
+          sync = false;
+        }
+
         if (sync) {
           ret = res.write(chunk, encoding);
           sync = false;