diff --git a/src/header/common/set_cookie.rs b/src/header/common/set_cookie.rs
index 63614de9..55528e82 100644
--- a/src/header/common/set_cookie.rs
+++ b/src/header/common/set_cookie.rs
@@ -1,6 +1,7 @@
 use header::Header;
 use std::fmt;
 use std::str::from_utf8;
+use cookie::CookieJar;
 
 /// The `Set-Cookie` header
 ///
@@ -40,3 +41,12 @@ impl Header for SetCookie {
     }
 }
 
+impl SetCookie {
+    /// Use this to crate SetCookie header from CookieJar using
+    /// calculated delta.
+    #[allow(dead_code)]
+    fn from_cookie_jar(jar: &CookieJar) -> SetCookie {
+        SetCookie(jar.delta())
+    }
+}
+