diff --git a/.github/workflows/post-github-activity-pr.yml b/.github/workflows/post-github-activity-pr.yml
index 1402c11c7df..6b52876f7c2 100644
--- a/.github/workflows/post-github-activity-pr.yml
+++ b/.github/workflows/post-github-activity-pr.yml
@@ -58,7 +58,7 @@ jobs:
           python scripts/discord/post-discord-message.py
         working-directory: ${{ github.workspace }}
         env:
-          MESSAGE: ":eyeglasses:  Review requested: join(github.event.pull_request.requested_reviewers.*.login, ', ') would you please review [#${{github.event.pull_request.number}}](https://github.com/sofa-framework/sofa/pull/${{github.event.pull_request.number}})?"
+          MESSAGE: ":eyeglasses:  Review requested: ${{ join(github.event.pull_request.requested_reviewers.*.login, ', ') }} would you please review [#${{github.event.pull_request.number}}](https://github.com/sofa-framework/sofa/pull/${{github.event.pull_request.number}})?"
           BOT_NAME: "SOFA Github bot"
           EMBEDS_TITLE: ""
           EMBEDS_URL: ""