diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
index 67dc5f5..206d835 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
@@ -157,6 +157,30 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Select the database
+	 *
+	 * @param	string	$database
+	 * @return	bool
+	 */
+	public function db_select($database = '')
+	{
+		if ($database === '')
+		{
+			$database = $this->database;
+		}
+
+		if (FALSE !== $this->simple_query('USE '.$this->escape_identifiers($database)))
+		{
+			$this->database = $database;
+			return TRUE;
+		}
+
+		return FALSE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Show table query
 	 *
 	 * Generates a platform-specific query string so that the table names can be fetched
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 94a3832..596cd0f 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -17,6 +17,7 @@
 -  Fixed a bug (#3733) - Autoloading of libraries with aliases didn't work, although it was advertised to.
 -  Fixed a bug (#3744) - Redis :doc:`Caching <libraries/caching>` driver didn't handle authentication failures properly.
 -  Fixed a bug (#3761) - :doc:`URL Helper <helpers/url_helper>` function :php:func:`anchor()` didn't work with array inputs.
+-  Fixed a bug (#3773) - ``db_select()`` didn't work for MySQL with the PDO :doc:`Database <database/index>` driver.
 
 Version 3.0.0
 =============