diff --git a/qemu/hw/i2c.c b/qemu/hw/i2c.c
index 5d283fb..f711db7 100644
--- a/qemu/hw/i2c.c
+++ b/qemu/hw/i2c.c
@@ -21,7 +21,7 @@ static void i2c_bus_save(QEMUFile *f, void *opaque)
 {
     i2c_bus *bus = (i2c_bus *)opaque;
 
-    qemu_put_byte(f, bus->current_dev ? bus->current_dev->address : -1);
+    qemu_put_be32(f, bus->current_dev ? bus->current_dev->address : -1);
 }
 
 static int i2c_bus_load(QEMUFile *f, void *opaque, int version_id)