diff --git a/css/default.css b/css/default.css
index 3d8a3ee52..ff0d1fcbe 100644
--- a/css/default.css
+++ b/css/default.css
@@ -147,6 +147,7 @@ a:active {color:#000;text-decoration:underline}
 .btn_submit {padding:0 10px;height:24px;border:0;background:#333;color:#fff;letter-spacing:-0.1em;vertical-align:top;cursor:pointer}
 .btn_cancel {display:inline-block;padding:0 10px;height:22px;border:1px solid #ccc;background:#fafafa;line-height:2em}
 .btn_frmline {display:inline-block;padding:0 7px 0 5px;height:22px;border:0;background:#333;color:#fff !important;letter-spacing:-0.1em;text-decoration:none;vertical-align:top;line-height:2em} /* 우편번호검색버튼 등 */
+button.btn_frmline {font-size:1em}
 .btn_win {clear:both;margin-bottom:20px;text-align:center} /* 새창용 */
 .btn_win a {display:inline-block;padding:0 10px;height:22px;border:1px solid #ccc;background:#fafafa;line-height:2em;cursor:pointer}
 .btn_win a:focus,
diff --git a/skin/member/kcpcert/register_form.skin.php b/skin/member/kcpcert/register_form.skin.php
index f8fa82724..275625649 100644
--- a/skin/member/kcpcert/register_form.skin.php
+++ b/skin/member/kcpcert/register_form.skin.php
@@ -94,7 +94,7 @@ if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가
         <input type="hidden" name="kcpcert_time" value="<?=$member['mb_hp_certify']?>">
         <input type="hidden" name="old_mb_hp" value="<?=$member['mb_hp']?>">
         <input type="text" name="mb_hp" value="<?=$member['mb_hp']?>" id="reg_mb_hp" required class="frm_input required" maxlength="20">
-        <button type="button" id="win_kcpcert">휴대폰인증</button>
+        <button type="button" id="win_kcpcert" class="btn_frmline">휴대폰인증</button>
         <noscript>휴대폰인증을 위해서는 자바스크립트 사용이 가능해야합니다.</noscript>
     </td>
 </tr>