diff --git a/wasi.go b/wasi.go
index fb1b6ed..0037ae5 100644
--- a/wasi.go
+++ b/wasi.go
@@ -126,6 +126,10 @@ func (t *FileTable[T]) Preopen(file T, path string, stat FDStat) FD {
 	return fd
 }
 
+func (t *FileTable[T]) PreopenFD(fd FD) {
+	t.preopens.Assign(fd, "")
+}
+
 func (t *FileTable[T]) Register(file T, stat FDStat) FD {
 	stat.RightsBase &= AllRights
 	stat.RightsInheriting &= AllRights