diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 37471d3c1c28..a57de4a5aa45 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -906,6 +906,7 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
 		return NULL;
 
 	probe_ent->n_ports = 2;
+	probe_ent->irq_flags = IRQF_SHARED;
 
 	if (port_mask & ATA_PORT_PRIMARY) {
 		probe_ent->irq = ATA_PRIMARY_IRQ;