diff --git a/include/cinatra/ylt/coro_io/channel.hpp b/include/cinatra/ylt/coro_io/channel.hpp
index bdaec57..ed6dab6 100644
--- a/include/cinatra/ylt/coro_io/channel.hpp
+++ b/include/cinatra/ylt/coro_io/channel.hpp
@@ -160,10 +160,7 @@ class channel {
   channel(const channel& o) = delete;
   channel& operator=(const channel& o) = delete;
 
-  auto send_request(auto op, typename client_t::config& config)
-      -> decltype(std::declval<client_pool_t>().send_request(std::move(op),
-                                                             std::string_view{},
-                                                             config)) {
+  auto send_request(auto op, typename client_t::config& config) {
     std::shared_ptr<client_pool_t> client_pool;
     if (client_pools_.size() > 1) {
       client_pool = co_await std::visit(