diff --git a/async_others.go b/async_others.go
new file mode 100644
index 00000000..4d0758ca
--- /dev/null
+++ b/async_others.go
@@ -0,0 +1,8 @@
+//go:build !linux
+// +build !linux
+
+package log
+
+func (w *AsyncWriter) vwriter() {
+	panic("not_implemented")
+}