diff --git a/bbs/register_form_update.php b/bbs/register_form_update.php
index 79ce3d407..9dd6add28 100644
--- a/bbs/register_form_update.php
+++ b/bbs/register_form_update.php
@@ -646,6 +646,8 @@ if($w == '' && isset($default['de_member_reg_coupon_use']) && $default['de_membe
             if($j > 20)
                 break;
         }
+
+        $j++;
     } while(1);
 
     if($create_coupon) {
diff --git a/plugin/social/register_member_update.php b/plugin/social/register_member_update.php
index 28817e9f8..28736f415 100644
--- a/plugin/social/register_member_update.php
+++ b/plugin/social/register_member_update.php
@@ -305,6 +305,8 @@ if($result) {
                 if($j > 20)
                     break;
             }
+
+            $j++;
         } while(1);
 
         if($create_coupon) {