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-rw-r--r--hw/isa/apm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/isa/apm.c b/hw/isa/apm.c
index 5f21d21473..daed6f1b51 100644
--- a/hw/isa/apm.c
+++ b/hw/isa/apm.c
@@ -96,7 +96,7 @@ void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback,
apm->arg = arg;
/* ioport 0xb2, 0xb3 */
- memory_region_init_io(&apm->io, &apm_ops, apm, "apm-io", 2);
+ memory_region_init_io(&apm->io, NULL, &apm_ops, apm, "apm-io", 2);
memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT,
&apm->io);
}