diff --git a/application/common/model/UserWallet.php b/application/common/model/UserWallet.php
index 108781dc..599b2902 100644
--- a/application/common/model/UserWallet.php
+++ b/application/common/model/UserWallet.php
@@ -323,6 +323,7 @@ class UserWallet extends Model
         } else {
             $table_name_log = 'user_earnings_log';
         }
+        $where = [];
         if ($seach['stime']) {
             $where['createtime'] = ['>=', strtotime($seach['stime'])];
         }