diff --git a/src/main/webapp/WEB-INF/jsp/web/msgdata/MsgDataView.jsp b/src/main/webapp/WEB-INF/jsp/web/msgdata/MsgDataView.jsp
index 50d9ddfc..e08a8c96 100644
--- a/src/main/webapp/WEB-INF/jsp/web/msgdata/MsgDataView.jsp
+++ b/src/main/webapp/WEB-INF/jsp/web/msgdata/MsgDataView.jsp
@@ -134,7 +134,7 @@ function getMjMsgGroupInfoByResend() {
 				}
 				
 				// 문자내용
-				if (smsTxt.lastIndexOf("(광고)") != -1) {
+				if (smsTxt.indexOf("(광고)") == 0) {
 					$('#send_adYnY').prop('checked', true);
 					
 					//광고 상하단 내용 넣어주기