diff --git a/src/comment.ts b/src/comment.ts
index 78504db..7497acc 100644
--- a/src/comment.ts
+++ b/src/comment.ts
@@ -1,21 +1,23 @@
+const HEADER = "<!-- Sticky Pull Request Comment -->";
+
 export async function findPreviousComment(octokit, repo, issue_number) {
   const { data: comments } = await octokit.issues.listComments({
     ...repo,
     issue_number
   });
-  return comments.find(comment => comment.user.login === "github-actions[bot]");
+  return comments.find(comment => comment.body.startsWith(HEADER));
 }
 export async function updateComment(octokit, repo, comment_id, body) {
   await octokit.issues.updateComment({
     ...repo,
     comment_id,
-    body
+    body: `${HEADER}\n${body}`
   });
 }
 export async function createComment(octokit, repo, issue_number, body) {
   await octokit.issues.createComment({
     ...repo,
     issue_number,
-    body
+    body: `${HEADER}\n${body}`
   });
 }