fixed a variable call to $this->
diff --git a/system/database/drivers/odbc/odbc_driver.php b/system/database/drivers/odbc/odbc_driver.php
index daecabe..604dd77 100644
--- a/system/database/drivers/odbc/odbc_driver.php
+++ b/system/database/drivers/odbc/odbc_driver.php
@@ -41,7 +41,7 @@
 

 	function CI_DB_odbc_driver()

 	{

-		$_random_keyword = ' RND('.time().')'; // database specific random keyword

+		$this->_random_keyword = ' RND('.time().')'; // database specific random keyword

 	}

 

 	/**