diff --git a/include/hw/pci-host/pnv_phb4.h b/include/hw/pci-host/pnv_phb4.h
index b02ecdceaa..19dcbd6f87 100644
--- a/include/hw/pci-host/pnv_phb4.h
+++ b/include/hw/pci-host/pnv_phb4.h
@@ -180,7 +180,7 @@ struct PnvPhb4PecState {
     MemoryRegion nest_regs_mr;
 
     /* PCI registers, excluding per-stack */
-#define PHB4_PEC_PCI_REGS_COUNT     0x2
+#define PHB4_PEC_PCI_REGS_COUNT     0x3
     uint64_t pci_regs[PHB4_PEC_PCI_REGS_COUNT];
     MemoryRegion pci_regs_mr;