diff --git a/src/pkg/os/error_windows.go b/src/pkg/os/error_windows.go
index 5d692b0736..fbb0d4f3fe 100644
--- a/src/pkg/os/error_windows.go
+++ b/src/pkg/os/error_windows.go
@@ -26,5 +26,5 @@ func isPermission(err error) bool {
 	if pe, ok := err.(*PathError); ok {
 		err = pe.Err
 	}
-	return err == ErrPermission
+	return err == syscall.ERROR_ACCESS_DENIED || err == ErrPermission
 }