diff --git a/demo/echo_server.cpp b/demo/echo_server.cpp
index 4c6aa6f..a6f9685 100644
--- a/demo/echo_server.cpp
+++ b/demo/echo_server.cpp
@@ -21,7 +21,7 @@ int runningCoroutines = 0;
 
 uio::task<> accept_connection(uio::io_service& service, int serverfd) {
     while (int clientfd = co_await service.accept(serverfd, nullptr, nullptr)) {
-        // [=, &service](int clientfd) -> task<> {
+        [](uio::io_service& service, int clientfd) -> uio::task<> {
             fmt::print("sockfd {} is accepted; number of running coroutines: {}\n",
                 clientfd, ++runningCoroutines);
 #if USE_SPLICE
@@ -63,7 +63,7 @@ uio::task<> accept_connection(uio::io_service& service, int serverfd) {
             co_await service.close(clientfd);
             fmt::print("sockfd {} is closed; number of running coroutines: {}\n",
                 clientfd, --runningCoroutines);
-        // }(clientfd);
+        }(service, clientfd);
     }
 }
 
diff --git a/demo/file_server.cpp b/demo/file_server.cpp
index ee8b1d7..e6b8ede 100644
--- a/demo/file_server.cpp
+++ b/demo/file_server.cpp
@@ -103,7 +103,7 @@ uio::task<> accept_connection(uio::io_service& service, int serverfd, int dirfd)
 
     while (int clientfd = co_await service.accept(serverfd, nullptr, nullptr)) {
         // Start worker coroutine to handle new requests
-        [=, &service](int clientfd) -> task<> {
+        [](uio::io_service& service, int dirfd, int clientfd) -> task<> {
             ++runningCoroutines;
             auto start = std::chrono::high_resolution_clock::now();
             try {
@@ -121,7 +121,7 @@ uio::task<> accept_connection(uio::io_service& service, int serverfd, int dirfd)
                 clientfd,
                 std::chrono::high_resolution_clock::now() - start);
             --runningCoroutines;
-        }(clientfd);
+        }(service, dirfd, clientfd);
     }
 }