diff --git a/README.md b/README.md
index 08b5704a4..5b7bc286a 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@
 [![MacOS](https://github.com/tamatebako/dwarfs/actions/workflows/macos.yml/badge.svg)](https://github.com/tamatebako/dwarfs/actions/workflows/macos.yml)
 [![Alpine](https://github.com/tamatebako/dwarfs/actions/workflows/alpine.yml/badge.svg)](https://github.com/tamatebako/dwarfs/actions/workflows/alpine.yml)
 [![Windows](https://github.com/tamatebako/dwarfs/actions/workflows/windows.yml/badge.svg)](https://github.com/tamatebako/dwarfs/actions/workflows/windows.yml)
+[![Windows-MSys](https://github.com/tamatebako/dwarfs/actions/workflows/windows-msys.yml/badge.svg)](https://github.com/tamatebako/dwarfs/actions/workflows/windows-msys.yml)
 
 [![Build Status](https://api.cirrus-ci.com/github/tamatebako/dwarfs.svg?task=macos-arm64)](https://cirrus-ci.com/github/tamatebako/dwarfs)
 [![Build Status](https://api.cirrus-ci.com/github/tamatebako/dwarfs.svg?task=ubuntu-aarch64)](https://cirrus-ci.com/github/tamatebako/dwarfs)