diff --git a/hw/pci-host/pnv_phb3.c b/hw/pci-host/pnv_phb3.c
index 4e68ad4f03..3f03467dde 100644
--- a/hw/pci-host/pnv_phb3.c
+++ b/hw/pci-host/pnv_phb3.c
@@ -1161,6 +1161,7 @@ static void pnv_phb3_root_port_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, local_err);
         return;
     }
+    pci_config_set_interrupt_pin(pci->config, 0);
 }
 
 static void pnv_phb3_root_port_class_init(ObjectClass *klass, void *data)
diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
index 3c4c2dace0..13ba9e45d8 100644
--- a/hw/pci-host/pnv_phb4.c
+++ b/hw/pci-host/pnv_phb4.c
@@ -1771,6 +1771,7 @@ static void pnv_phb4_root_port_reset(DeviceState *dev)
     pci_set_word(conf + PCI_PREF_MEMORY_LIMIT, 0xfff1);
     pci_set_long(conf + PCI_PREF_BASE_UPPER32, 0x1); /* Hack */
     pci_set_long(conf + PCI_PREF_LIMIT_UPPER32, 0xffffffff);
+    pci_config_set_interrupt_pin(conf, 0);
 }
 
 static void pnv_phb4_root_port_realize(DeviceState *dev, Error **errp)