diff --git a/file.go b/file.go
new file mode 100644
index 0000000..a3a2536
--- /dev/null
+++ b/file.go
@@ -0,0 +1,30 @@
+package net
+
+import (
+	"errors"
+	"os"
+)
+
+// TINYGO: this package manages its own file descriptors and cannot adopt an
+// arbitrary OS fd, so these exist only to let callers compile.
+
+var errFileNotImplemented = errors.New("net: File-based listeners/conns are not implemented on this target")
+
+// FileListener returns a copy of the network listener corresponding to the open
+// file f.
+func FileListener(f *os.File) (ln Listener, err error) {
+	return nil, errFileNotImplemented
+}
+
+// FileConn returns a copy of the network connection corresponding to the open
+// file f.
+func FileConn(f *os.File) (c Conn, err error) {
+	return nil, errFileNotImplemented
+}
+
+// File returns a copy of the underlying os.File.
+//
+// TINYGO: a listener here has no OS file descriptor to hand back.
+func (l *TCPListener) File() (f *os.File, err error) {
+	return nil, errFileNotImplemented
+}