diff --git a/code-scanning/codeql.yml b/code-scanning/codeql.yml
index 6fdadb1..655fc59 100644
--- a/code-scanning/codeql.yml
+++ b/code-scanning/codeql.yml
@@ -76,6 +76,7 @@ jobs:
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
     - if: matrix.build-mode == 'manual'
+      shell: bash
       run: |
         echo 'If you are using a "manual" build mode for one or more of the' \
           'languages you are analyzing, replace this with the commands to build' \