diff --git a/.github/workflows/clang-format.yml b/.github/workflows/clang-format.yml
index d2702bf3a..e6d8dee9a 100644
--- a/.github/workflows/clang-format.yml
+++ b/.github/workflows/clang-format.yml
@@ -32,10 +32,12 @@ jobs:
             echo "      ${new_fname}"
             new_fname=`echo ${new_fname} | tr 'A-Z' 'a-z'`
             echo "      ${new_fname}"
+            new_fname=`echo ${new_fname} | tr '-' '_'`
+            echo "      ${new_fname}"
             if [ ${fname} != ${new_fname} ]
             then
               echo "      ${fname} --> ${new_fname}"
-              git mv \"${fname}\" ${new_fname}
+              git "mv" "${fname}" ${new_fname}
             fi
           done
           git commit -am "formatting filenames $GITHUB_SHA" ||  true