@@ -291,7 +291,7 @@ func (p *OAuthProxy) MakeSessionCookie(req *http.Request, value string, expirati
291291 value = cookie.SignedValue(p.CookieSeed, p.CookieName, value, now)
292292 }
293293 c := p.makeCookie(req, p.CookieName, value, expiration, now)
294− if len(c.Value) > 4096 {
294+ if len(c.Value) > 4096-len(p.CookieName) {
295295 return splitCookie(c)
296296 }
297297 return []*http.Cookie{c}