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-rw-r--r--hw/mc146818rtc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
index 2b91fa839e..6466aff316 100644
--- a/hw/mc146818rtc.c
+++ b/hw/mc146818rtc.c
@@ -605,6 +605,7 @@ static int rtc_initfn(ISADevice *dev)
register_ioport_write(base, 2, 1, cmos_ioport_write, s);
register_ioport_read(base, 2, 1, cmos_ioport_read, s);
+ isa_init_ioport_range(dev, base, 2);
qdev_set_legacy_instance_id(&dev->qdev, base, 2);
qemu_register_reset(rtc_reset, s);