diff --git a/css/mobile.css b/css/mobile.css
index 6316c221e..1e1e9279f 100644
--- a/css/mobile.css
+++ b/css/mobile.css
@@ -116,6 +116,7 @@ a:hover, a:focus, a:active {color:#000;text-decoration:underline}
 #captcha #captcha_reload {margin:0;padding:0 5px;height:32px;border:0;background:#e4eaec;vertical-align:middle;overflow:hidden;cursor:pointer}
 #captcha #captcha_key {margin:0 0 0 4px;padding:0 5px;width:50px;height:30px;border:1px solid #b8c9c2;background:#f7f7f7;font-size:1.333em;font-weight:bold;text-align:center;line-height:2em}
 #captcha #captcha_info {display:block;margin:5px 0 0;font-size:0.95em;letter-spacing:-0.1em}
+#captcha #captcha_mp3{margin:0;padding:0 5px;height:32px;border:0;background:#e4eaec;vertical-align:middle;overflow:hidden;cursor:pointer}
 
 /* 버튼 */
 a.btn01 {display:inline-block;padding:8px 7px 7px;border:1px solid #ccc;background:#fafafa;color:#000;text-decoration:none;vertical-align:middle}
diff --git a/theme/basic/css/mobile.css b/theme/basic/css/mobile.css
index bbbc357f8..71522db79 100644
--- a/theme/basic/css/mobile.css
+++ b/theme/basic/css/mobile.css
@@ -116,6 +116,7 @@ a:hover, a:focus, a:active {color:#000;text-decoration:underline}
 #captcha #captcha_reload {margin:0;padding:0 5px;height:32px;border:0;background:#e4eaec;vertical-align:middle;overflow:hidden;cursor:pointer}
 #captcha #captcha_key {margin:0 0 0 4px;padding:0 5px;width:50px;height:30px;border:1px solid #b8c9c2;background:#f7f7f7;font-size:1.333em;font-weight:bold;text-align:center;line-height:2em}
 #captcha #captcha_info {display:block;margin:5px 0 0;font-size:0.95em;letter-spacing:-0.1em}
+#captcha #captcha_mp3{margin:0;padding:0 5px;height:32px;border:0;background:#e4eaec;vertical-align:middle;overflow:hidden;cursor:pointer}
 
 /* 버튼 */
 a.btn01 {display:inline-block;padding:8px 7px 7px;border:1px solid #ccc;background:#fafafa;color:#000;text-decoration:none;vertical-align:middle}