diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 2ad5e3b..4023a14 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -63,6 +63,7 @@ jobs:
           &nmake -f makefile.vc clean
           &nmake TCLDIR=..\..\tcl9 TKDIR=..\..\tk9 -f makefile.vc
           &nmake INSTALLDIR=..\..\TclTk9 -f makefile.vc install
+	shell: cmd
         working-directory: win
 
       - name: List directory with bash