diff --git a/.github/workflows/contributor-check.yml b/.github/workflows/contributor-check.yml
index ab6a09bf4..779f3fee4 100644
--- a/.github/workflows/contributor-check.yml
+++ b/.github/workflows/contributor-check.yml
@@ -194,8 +194,7 @@ jobs:
           marker="<!-- agt-contributor-check -->"
           comment_ids=$(
             gh api "repos/${{ github.repository }}/issues/$number/comments" --paginate \
-              --arg marker "$marker" \
-              --jq '.[] | select(.user.login == "github-actions[bot]" and ((.body // "") | contains($marker))) | .id'
+              | jq -r --arg marker "$marker" '.[] | select((.user.login // "") == "github-actions[bot]" and ((.body // "") | contains($marker))) | .id'
           )
           comment_id=$(printf "%s\n" "$comment_ids" | sed -n '1p')