diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 38fd1768..fdf82cac 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,6 +16,7 @@ jobs:
         - { name: 'MSVC',           shell: 'sh',        setup-cmake: true, setup-ninja: true, setup-msvc: true }
         # TODO: Add back eventually, but exclude 3rdparty code from warnings as errors
         - { name: 'msys2 mingw32',  shell: 'msys2 {0}', msystem: mingw32, msys-env: mingw-w64-i686,        clang-tidy: true, werror: true, no-dx5-libs: true }
+        - { name: 'msys2 mingw64',  shell: 'msys2 {0}', msystem: mingw64, msys-env: mingw-w64-x86_64,      clang-tidy: true, werror: true, no-dx5-libs: true }
         # - { name: 'msys2 clang32',  shell: 'msys2 {0}', msystem: clang32, msys-env: mingw-w64-clang-i686,  clang-tidy: true, werror: true, no-dx5-libs: true }
 
     steps: