diff --git a/include/boost/process/detail/posix/async_in.hpp b/include/boost/process/detail/posix/async_in.hpp
index ff8d4c4b..92a60529 100644
--- a/include/boost/process/detail/posix/async_in.hpp
+++ b/include/boost/process/detail/posix/async_in.hpp
@@ -46,8 +46,6 @@ struct async_in_buffer : ::boost::process::detail::posix::async_handler
     template <typename Executor>
     inline void on_success(Executor &exec) const
     {
-        boost::asio::io_service &is_ser = get_io_service(exec.seq);
-
 
         auto  pipe              = this->pipe;