diff --git a/src/stdplus/fd/intf.hpp b/src/stdplus/fd/intf.hpp
index aac85a2..bd8de13 100644
--- a/src/stdplus/fd/intf.hpp
+++ b/src/stdplus/fd/intf.hpp
@@ -1,9 +1,11 @@
 #pragma once
 #include <cstddef>
 #include <fcntl.h>
+#include <optional>
 #include <stdplus/flags.hpp>
 #include <stdplus/types.hpp>
 #include <sys/socket.h>
+#include <tuple>
 
 namespace stdplus
 {
@@ -91,6 +93,9 @@
     virtual size_t lseek(off_t offset, Whence whence) = 0;
     virtual void truncate(off_t size) = 0;
     virtual void bind(span<const std::byte> sockaddr) = 0;
+    virtual void listen(int backlog) = 0;
+    virtual std::tuple<std::optional<int>, span<std::byte>>
+        accept(span<std::byte> sockaddr) = 0;
     virtual void setsockopt(SockLevel level, SockOpt optname,
                             span<const std::byte> opt) = 0;
     virtual int ioctl(unsigned long id, void* data) = 0;