diff --git a/.gitea/workflows/auto-pr.yml b/.gitea/workflows/auto-pr.yml
index cdd89b5..99ac8f7 100644
--- a/.gitea/workflows/auto-pr.yml
+++ b/.gitea/workflows/auto-pr.yml
@@ -33,6 +33,21 @@ jobs:
           echo "API status: $HTTP_CODE"
           if [ "$HTTP_CODE" = "201" ]; then
             echo "PR created"; cat /tmp/pr_resp.json
+            PR_NUMBER=$(cat /tmp/pr_resp.json | sed -n 's/.*"number":\([0-9]*\).*/\1/p' | head -n1)
           else
             echo "PR not created (possibly exists). Response:"; cat /tmp/pr_resp.json || true
+            # Find existing open PR for this branch
+            curl -sS -o /tmp/pr_list.json -H "Authorization: token ${CI_TOKEN}" \
+              "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/pulls?state=open" || true
+            PR_NUMBER=$(cat /tmp/pr_list.json | awk -v b="$HEAD_BRANCH" 'BEGIN{RS="},"} {if($0~"\"head\":\{[^}]*\"ref\":\""b"\""){match($0,/\"number\":([0-9]+)/,m); if(m[1]!=""){print m[1]; exit}}}')
+          fi
+          if [ -n "${PR_NUMBER:-}" ]; then
+            echo "Adding 'automerge' label to PR #$PR_NUMBER"
+            curl -sS -X POST \
+              -H "Content-Type: application/json" \
+              -H "Authorization: token ${CI_TOKEN}" \
+              "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/issues/${PR_NUMBER}/labels" \
+              -d '["automerge"]' || true
+          else
+            echo "PR number could not be determined; skipping label add"
           fi