diff --git a/skin/member/basic/register_form.skin.php b/skin/member/basic/register_form.skin.php
index d38367053..613d353b5 100644
--- a/skin/member/basic/register_form.skin.php
+++ b/skin/member/basic/register_form.skin.php
@@ -214,7 +214,7 @@ if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가
 <?php if ($w == "" && $config['cf_use_recommend']) {  ?>
 <tr>
     <th scope="row"><label for="reg_mb_recommend">추천인아이디</label></th>
-    <td><input type="text" name="mb_recommend" id="reg_mb_recommend" class="frm_input" required></td>
+    <td><input type="text" name="mb_recommend" id="reg_mb_recommend" class="frm_input"></td>
 </tr>
 <?php }  ?>
 
@@ -337,7 +337,7 @@ function fregisterform_submit(f)
         }
     }
 
-    if (typeof(f.mb_recommend) != 'undefined') {
+    if (typeof(f.mb_recommend) != 'undefined' && f.mb_recommend.value) {
         if (f.mb_id.value == f.mb_recommend.value) {
             alert('본인을 추천할 수 없습니다.');
             f.mb_recommend.focus();