diff --git a/lib/common.lib.php b/lib/common.lib.php
index 053486975..17cd81a90 100644
--- a/lib/common.lib.php
+++ b/lib/common.lib.php
@@ -1683,7 +1683,10 @@ function sql_connect($host, $user, $pass, $db=G5_MYSQL_DB)
             die('Connect Error: '.mysqli_connect_error());
         }
     } else {
-        $link = mysql_connect($host, $user, $pass);
+        if (!function_exists('mysql_connect')) {
+            die('MySQL이 설치되지 않아 mysql_connect 함수를 사용할 수 없습니다.');
+        }
+        $link = mysql_connect($host, $user, $pass) or die('MySQL Host, User, Password 정보에 오류가 있습니다.');
     }
 
     return $link;