diff --git a/app/common/service/PostFavoriteService.php b/app/common/service/PostFavoriteService.php
index 492f3d8..996585d 100644
--- a/app/common/service/PostFavoriteService.php
+++ b/app/common/service/PostFavoriteService.php
@@ -127,7 +127,7 @@ class PostFavoriteService
         $count = PostFavorite::where($where)->delete();
 
         if ($count) {
-            $post = PostFavorite::where(['id' => $param['post_id']])->first();
+            $post = Post::where(['id' => $param['post_id']])->first();
             $post['favorite'] = $post['favorite']-1;
             $post['favorite'] = $post['favorite']<0?0:$post['favorite'];
             $post->save();