diff --git a/include/asioexec/completion_token.hpp b/include/asioexec/completion_token.hpp
index fe1cc2155..d5c63f94e 100644
--- a/include/asioexec/completion_token.hpp
+++ b/include/asioexec/completion_token.hpp
@@ -527,6 +527,7 @@ namespace ASIOEXEC_ASIO_NAMESPACE {
   template <typename... Signatures>
   struct async_result<::asioexec::completion_token_t, Signatures...> {
     template <typename Initiation, typename... Args>
+      requires (std::is_constructible_v<std::decay_t<Args>, Args> && ...)
     static constexpr auto
       initiate(Initiation&& i, const ::asioexec::completion_token_t&, Args&&... args) {
       return ::asioexec::detail::completion_token::sender<
diff --git a/include/asioexec/use_sender.hpp b/include/asioexec/use_sender.hpp
index 0ae7c148b..d0e67460e 100644
--- a/include/asioexec/use_sender.hpp
+++ b/include/asioexec/use_sender.hpp
@@ -212,6 +212,7 @@ namespace ASIOEXEC_ASIO_NAMESPACE {
   template <typename... Signatures>
   struct async_result<::asioexec::use_sender_t, Signatures...> {
     template <typename Initiation, typename... Args>
+      requires(std::is_constructible_v<std::decay_t<Args>, Args> && ...)
     static constexpr auto
       initiate(Initiation&& i, const ::asioexec::use_sender_t&, Args&&... args) {
       return ::asioexec::detail::use_sender::sender(
diff --git a/test/asioexec/test_completion_token.cpp b/test/asioexec/test_completion_token.cpp
index dd478e59b..fc6f0c56b 100644
--- a/test/asioexec/test_completion_token.cpp
+++ b/test/asioexec/test_completion_token.cpp
@@ -997,4 +997,25 @@ namespace {
     CHECK(ctx.stopped());
   }
 
+  TEST_CASE(
+    "Substitution into async_result<completion_token, ...>::initiate is SFINAE-friendly",
+    "[asioexec][completion_token]") {
+    asio_impl::io_context ctx;
+    asio_impl::ip::tcp::socket socket(ctx);
+    asio_impl::streambuf buf;
+    //  With a SFINAE-unfriendly async_result<...>::initiate the below line doesn't compile because there's a hard compilation error trying to consider the async_read overload for dynamic buffers
+    //
+    //  See: https://github.com/NVIDIA/stdexec/issues/1684
+    auto sender = asio_impl::async_read(socket, buf, completion_token);
+    auto op = ::stdexec::connect(
+      std::move(sender) | ::stdexec::then([](const auto ec, const auto bytes_transferred) {
+        CHECK(ec);
+        CHECK(!bytes_transferred);
+      }),
+      expect_void_receiver{});
+    ::stdexec::start(op);
+    CHECK(ctx.run() != 0);
+    CHECK(ctx.stopped());
+  }
+
 } // namespace
diff --git a/test/asioexec/test_use_sender.cpp b/test/asioexec/test_use_sender.cpp
index 08eb472be..69b9963a5 100644
--- a/test/asioexec/test_use_sender.cpp
+++ b/test/asioexec/test_use_sender.cpp
@@ -250,4 +250,20 @@ namespace {
     CHECK(ctx.stopped());
   }
 
+  TEST_CASE(
+    "Substitution into async_result<use_sender, ...>::initiate is SFINAE-friendly",
+    "[asioexec][completion_token]") {
+    asio_impl::io_context ctx;
+    asio_impl::ip::tcp::socket socket(ctx);
+    asio_impl::streambuf buf;
+    //  With a SFINAE-unfriendly async_result<...>::initiate the below line doesn't compile because there's a hard compilation error trying to consider the async_read overload for dynamic buffers
+    //
+    //  See: https://github.com/NVIDIA/stdexec/issues/1684
+    auto sender = asio_impl::async_read(socket, buf, use_sender);
+    auto op = ::stdexec::connect(std::move(sender), expect_error_receiver{});
+    ::stdexec::start(op);
+    CHECK(ctx.run() != 0);
+    CHECK(ctx.stopped());
+  }
+
 } // namespace