diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 33f7e83687..041cc87c11 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1862,12 +1862,11 @@ static void sysbus_ahci_realize(DeviceState *dev, Error **errp)
 {
     SysbusAHCIState *s = SYSBUS_AHCI(dev);
 
-    s->ahci.ports = s->num_ports;
     ahci_realize(&s->ahci, dev, &address_space_memory);
 }
 
 static Property sysbus_ahci_properties[] = {
-    DEFINE_PROP_UINT32("num-ports", SysbusAHCIState, num_ports, 1),
+    DEFINE_PROP_UINT32("num-ports", SysbusAHCIState, ahci.ports, 1),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/include/hw/ide/ahci.h b/include/hw/ide/ahci.h
index 604d3a0994..c0b10c2bb4 100644
--- a/include/hw/ide/ahci.h
+++ b/include/hw/ide/ahci.h
@@ -63,7 +63,6 @@ struct SysbusAHCIState {
     /*< public >*/
 
     AHCIState ahci;
-    uint32_t num_ports;
 };
 
 #define TYPE_ALLWINNER_AHCI "allwinner-ahci"