diff --git a/system/database/drivers/ibase/ibase_forge.php b/system/database/drivers/ibase/ibase_forge.php
index 73968bd..3cab264 100644
--- a/system/database/drivers/ibase/ibase_forge.php
+++ b/system/database/drivers/ibase/ibase_forge.php
@@ -85,6 +85,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**