diff --git a/hw/acpi_pci_hotplug.h b/hw/acpi_pci_hotplug.h
index b97403d..220fca8 100644
--- a/hw/acpi_pci_hotplug.h
+++ b/hw/acpi_pci_hotplug.h
@@ -1,5 +1,5 @@
 #define PCI_HOTPLUG_ADDR 0xae00
-#define PCI_HOTPLUG_SIZE 0x000f
+#define PCI_HOTPLUG_SIZE 0x0010
 #define PCI_UP_BASE 0xae00
 #define PCI_DOWN_BASE 0xae04
 #define PCI_EJ_BASE 0xae08