diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c
index 40145408ef..ec6f186251 100644
--- a/hw/pci-host/prep.c
+++ b/hw/pci-host/prep.c
@@ -256,9 +256,7 @@ static void raven_pcihost_initfn(Object *obj)
     memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
     memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
                           "pci-io-non-contiguous", 0x00800000);
-    /* Open Hack'Ware hack: real size should be only 0x3f000000 bytes */
-    memory_region_init(&s->pci_memory, obj, "pci-memory",
-                       0x3f000000 + 0xc0000000ULL);
+    memory_region_init(&s->pci_memory, obj, "pci-memory", 0x3f000000);
     address_space_init(&s->pci_io_as, &s->pci_io, "raven-io");
 
     /* CPU address space */
diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
index 2383254f49..567f56e20c 100644
--- a/hw/ppc/prep.c
+++ b/hw/ppc/prep.c
@@ -382,7 +382,6 @@ static void ppc_prep_init(MachineState *machine)
 #endif
     int linux_boot, i, nb_nics1;
     MemoryRegion *ram = g_new(MemoryRegion, 1);
-    MemoryRegion *vga = g_new(MemoryRegion, 1);
     uint32_t kernel_base, initrd_base;
     long kernel_size, initrd_size;
     DeviceState *dev;
@@ -508,14 +507,6 @@ static void ppc_prep_init(MachineState *machine)
 
     /* init basic PC hardware */
     pci_vga_init(pci_bus);
-    /* Open Hack'Ware hack: PCI BAR#0 is programmed to 0xf0000000.
-     * While bios will access framebuffer at 0xf0000000, real physical
-     * address is 0xf0000000 + 0xc0000000 (PCI memory base).
-     * Alias the wrong memory accesses to the right place.
-     */
-    memory_region_init_alias(vga, NULL, "vga-alias", pci_address_space(pci),
-                             0xf0000000, 0x1000000);
-    memory_region_add_subregion_overlap(sysmem, 0xf0000000, vga, 10);
 
     nb_nics1 = nb_nics;
     if (nb_nics1 > NE2000_NB_MAX)