diff --git a/fn/run_windows.go b/fn/run_windows.go
index 928a6b41e..c79cc47fb 100644
--- a/fn/run_windows.go
+++ b/fn/run_windows.go
@@ -10,7 +10,7 @@ import (
 	"unsafe"
 )
 
-func getStdin() io.Reader {
+func stdin() io.Reader {
 	var stdin io.Reader = os.Stdin
 	if isTerminal(int(os.Stdin.Fd())) {
 		stdin = strings.NewReader("")
@@ -19,6 +19,8 @@ func getStdin() io.Reader {
 }
 
 func isTerminal(fd int) bool {
+	kernel32 := syscall.NewLazyDLL("kernel32.dll")
+	procGetConsoleMode := kernel32.NewProc("GetConsoleMode")
 	var st uint32
 	r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(fd), uintptr(unsafe.Pointer(&st)), 0)
 	return r != 0 && e == 0