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-rw-r--r--hw/char/serial-isa.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/char/serial-isa.c b/hw/char/serial-isa.c
index e06a802e24..0bce75bcb7 100644
--- a/hw/char/serial-isa.c
+++ b/hw/char/serial-isa.c
@@ -72,7 +72,7 @@ static void serial_isa_realizefn(DeviceState *dev, Error **errp)
serial_realize_core(s, errp);
qdev_set_legacy_instance_id(dev, isa->iobase, 3);
- memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8);
+ memory_region_init_io(&s->io, NULL, &serial_io_ops, s, "serial", 8);
isa_register_ioport(isadev, &s->io, isa->iobase);
}