diff --git a/backend/src/main/java/com/votogether/domain/vote/service/VoteService.java b/backend/src/main/java/com/votogether/domain/vote/service/VoteService.java
index 1bf91c3c4..81871bc18 100644
--- a/backend/src/main/java/com/votogether/domain/vote/service/VoteService.java
+++ b/backend/src/main/java/com/votogether/domain/vote/service/VoteService.java
@@ -42,7 +42,7 @@ public void vote(
 
     private void validateAlreadyVoted(Member member, Post post) {
         final PostOptions postOptions = post.getPostOptions();
-        List<Vote> alreadyVoted = voteRepository.findByMemberAndPostOptionIn(member, postOptions.getPostOptions());
+        final List<Vote> alreadyVoted = voteRepository.findByMemberAndPostOptionIn(member, postOptions.getPostOptions());
         if (!alreadyVoted.isEmpty()) {
             throw new IllegalStateException("해당 게시물에는 이미 투표하였습니다.");
         }