diff --git a/__tests__/comment.test.ts b/__tests__/comment.test.ts
index 7ad8271..b0a75f5 100644
--- a/__tests__/comment.test.ts
+++ b/__tests__/comment.test.ts
@@ -142,7 +142,7 @@ describe("updateComment", () => {
     expect(octokit.graphql).toBeCalledWith(expect.any(String), {
       input: {
         id: "456",
-        body: "hello there\n<!-- Sticky Pull Request CommentTypeA -->\nhello there"
+        body: "hello there\nhello there\n<!-- Sticky Pull Request CommentTypeA -->"
       }
     })
   })
diff --git a/src/comment.ts b/src/comment.ts
index 0da254a..ff6e0d9 100644
--- a/src/comment.ts
+++ b/src/comment.ts
@@ -20,7 +20,7 @@ function bodyWithHeader(body: string, header: string): string {
 }
 
 function bodyWithoutHeader(body: string, header: string): string {
-  return body.replace(`\n${headerComment(header)}`, "");
+  return body.replace(`\n${headerComment(header)}`, "")
 }
 
 export async function findPreviousComment(
@@ -92,8 +92,9 @@ export async function updateComment(
   if (!body && !previousBody)
     return core.warning("Comment body cannot be blank")
 
-  if (previousBody)
-    let rawPreviousBody = bodyWithoutHeader(previousBody, header)
+  const rawPreviousBody: String = previousBody
+    ? bodyWithoutHeader(previousBody, header)
+    : ""
 
   await octokit.graphql(
     `