diff --git a/src/net/posix-stack.cc b/src/net/posix-stack.cc
index 074c6c6b89..ead4bb396d 100644
--- a/src/net/posix-stack.cc
+++ b/src/net/posix-stack.cc
@@ -187,7 +187,9 @@ class posix_socket_impl final : public socket_impl {
     explicit posix_socket_impl(compat::polymorphic_allocator<char>* allocator=memory::malloc_allocator) : _allocator(allocator) {}
 
     virtual future<connected_socket> connect(socket_address sa, socket_address local, transport proto = transport::TCP) override {
-        return find_port_and_connect(sa, local, proto).then([fd = _fd, proto, allocator = _allocator] () mutable {
+        auto f = find_port_and_connect(sa, local, proto);
+        return f.then([this, proto, allocator = _allocator] () mutable {
+            auto fd = _fd;
             std::unique_ptr<connected_socket_impl> csi;
             if (proto == transport::TCP) {
                 csi.reset(new posix_connected_tcp_socket_impl(std::move(fd), allocator));