diff --git a/hw/sun4u.c b/hw/sun4u.c
index 32e6ab9beb..6afb0e7158 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -763,7 +763,6 @@ static void sun4uv_init(ram_addr_t RAM_size,
     irq = qemu_allocate_irqs(cpu_set_irq, env, MAX_PILS);
     pci_bus = pci_apb_init(APB_SPECIAL_BASE, APB_MEM_BASE, irq, &pci_bus2,
                            &pci_bus3);
-    isa_mem_base = APB_PCI_IO_BASE;
     pci_vga_init(pci_bus);
 
     // XXX Should be pci_bus3