diff --git a/pdodb.class.php b/pdodb.class.php
index 3f342b9..db927a9 100644
--- a/pdodb.class.php
+++ b/pdodb.class.php
@@ -45,6 +45,16 @@ class PDODB extends wpdb {
     return true;
   }
   
+  /**
+   * dummy out the MySQL function
+   * @see wpdb::set_charset()
+   */
+  function set_charset($dbh, $charset = null, $collate = null) {
+  	if ( ! isset( $charset ) )
+  		$charset = $this->charset;
+  	if ( ! isset( $collate ) )
+  		$collate = $this->collate;
+  }
   /**
    * dummy out the MySQL function
    * @see wpdb::select()
@@ -61,10 +71,7 @@ class PDODB extends wpdb {
    * @see wpdb::_real_escape()
    */
   function _real_escape($string) {
-    if ($this->dbh && $this->real_escape)
-      return $this->dbh->quote($string);
-    else
-      return addslashes($string);
+    return addslashes($string);
   }
   
   /**
diff --git a/readme-ja.txt b/readme-ja.txt
index 7ca25d9..00d923d 100644
--- a/readme-ja.txt
+++ b/readme-ja.txt
@@ -7,7 +7,7 @@ Author: Kojima Toshiyasu
 Author URI: http://dogwood.skr.jp/
 Requires at least: 3.3
 Tested up to: 3.6
-Stable tag: 1.2
+Stable tag: 1.2.1
 License: GPLv2
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -167,6 +167,9 @@ SQLite Integrationのアップグレードに失敗するようなら、FTPを
 
 == Changelog ==
 
+= 1.2.1 (2013-08-04) =
+* wp-db.php の変更にともなう修正をしました。WordPress 3.6 との互換性を保つためのものです。
+
 = 1.2 (2013-08-03) =
 * カレンダー・ウィジェットでの不具合に対応するため、日付フォーマットとそのクオートを修正しました。
 * Windows マシンでパッチファイルが削除できなかったのを修正しました。
diff --git a/readme.txt b/readme.txt
index 54d0a5b..4ebe687 100644
--- a/readme.txt
+++ b/readme.txt
@@ -7,7 +7,7 @@ Author: Kojima Toshiyasu
 Author URI: http://dogwood.skr.jp/
 Requires at least: 3.3
 Tested up to: 3.6
-Stable tag: 1.2
+Stable tag: 1.2.1
 License: GPLv2
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -158,6 +158,9 @@ When auto upgrading of SQLite Integration fails, please try manual upgrade via F
 
 == Changelog ==
 
+= 1.2.1 (2013-08-04) =
+* Changes following that of the wpdb.php file which makes the plugin compatible with Wordpress 3.6.
+
 = 1.2 (2013-08-03) =
 * Fixed the date string format and its quotation for calendar widget.
 * Fixed the patch utility program for using on the Windows machine.
diff --git a/sqlite-integration.php b/sqlite-integration.php
index 3095b45..677e071 100644
--- a/sqlite-integration.php
+++ b/sqlite-integration.php
@@ -4,7 +4,7 @@ Plugin Name: SQLite Integration
 Plugin URI: http://wordpress.org/extend/plugins/sqlite-integration
 Description: SQLite Integration is the plugin that enables WordPress to use SQLite. If you don't have MySQL and want to build a WordPress website, it's for you.
 Author: Kojima Toshiyasu
-Version: 1.2
+Version: 1.2.1
 Author URI: http://dogwood.skr.jp
 Text Domain: sqlite-integration
 Domain Path: /languages