1 files changed, 1 insertions, 1 deletions
diff --git a/hw/i2c/microbit_i2c.c b/hw/i2c/microbit_i2c.c
index 4661f05253..8024739820 100644
--- a/hw/i2c/microbit_i2c.c
+++ b/hw/i2c/microbit_i2c.c
@@ -100,7 +100,7 @@ static void microbit_i2c_realize(DeviceState *dev, Error **errp)
     MicrobitI2CState *s = MICROBIT_I2C(dev);
 
     memory_region_init_io(&s->iomem, OBJECT(s), &microbit_i2c_ops, s,
-                          "microbit.twi", NRF51_TWI_SIZE);
+                          "microbit.twi", NRF51_PERIPHERAL_SIZE);
     sysbus_init_mmio(sbd, &s->iomem);
 }