diff --git a/sys/dev/ahci/ahci.c b/sys/dev/ahci/ahci.c
index 61be5309327..b15a3b4865d 100644
--- a/sys/dev/ahci/ahci.c
+++ b/sys/dev/ahci/ahci.c
@@ -359,7 +359,9 @@ ahci_setup_interrupt(device_t dev)
 	for (i = 0; i < ctlr->numirqs; i++) {
 		ctlr->irqs[i].ctlr = ctlr;
 		ctlr->irqs[i].r_irq_rid = i + (ctlr->msi ? 1 : 0);
-		if (ctlr->numirqs == 1 || i >= ctlr->channels ||
+		if (ctlr->channels == 1 && !ctlr->ccc)
+			ctlr->irqs[i].mode = AHCI_IRQ_MODE_ONE;
+		else if (ctlr->numirqs == 1 || i >= ctlr->channels ||
 		    (ctlr->ccc && i == ctlr->cccv))
 			ctlr->irqs[i].mode = AHCI_IRQ_MODE_ALL;
 		else if (i == ctlr->numirqs - 1)