CodeIgniter: DBFORGE error using default CURRENT_TIMESTAMP

When adding a field to DBFORGE with type “timestamp” and default “CURRENT_TIMESTAMP” it renders a query:

time timestamp NOT NULL DEFAULT ‘CURRENT_TIMESTAMP’ COMMENT ‘’

However, this should be a special case, and render: (no single quotes)

time timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT ‘’

This matters for migrations. When writing a migration, this is necessary if you have a timestamp column. Note: I don’t know what is the case for “datetime” columns