diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c
index 25e56fb..0208906 100644
--- a/drivers/scsi/sata_promise.c
+++ b/drivers/scsi/sata_promise.c
@@ -158,7 +158,7 @@
 	.host_stop		= ata_pci_host_stop,
 };
 
-static struct ata_port_info pdc_port_info[] = {
+static const struct ata_port_info pdc_port_info[] = {
 	/* board_2037x */
 	{
 		.sht		= &pdc_ata_sht,