diff --git a/drivers/ata/pata_ninja32.c b/drivers/ata/pata_ninja32.c
index 633aa2934a18..44f97ad3c88d 100644
--- a/drivers/ata/pata_ninja32.c
+++ b/drivers/ata/pata_ninja32.c
@@ -144,7 +144,7 @@ static int ninja32_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 	ap->ioaddr.altstatus_addr = base + 0x1E;
 	ap->ioaddr.bmdma_addr = base;
 	ata_sff_std_ports(&ap->ioaddr);
-	ap->pflags = ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
+	ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
 
 	ninja32_program(base);
 	/* FIXME: Should we disable them at remove ? */