diff --git a/.github/workflows/cmake_windows_msys2.yml b/.github/workflows/cmake_windows_msys2.yml
index 91442eafd..c9399fa1b 100644
--- a/.github/workflows/cmake_windows_msys2.yml
+++ b/.github/workflows/cmake_windows_msys2.yml
@@ -3,6 +3,9 @@ name: CMake (Windows, msys2)
 on:
 
   push:
+    branches:
+      - main
+
     paths:
       - src/**
       - cmake/**