diff --git a/source/hassio/zwave.markdown b/source/hassio/zwave.markdown
index 84b2ccf45c6..5ca6414b8dd 100644
--- a/source/hassio/zwave.markdown
+++ b/source/hassio/zwave.markdown
@@ -21,7 +21,12 @@ If you need GPIO on raspberry-pi3 for you Z-Wave module add follow line into `co
 dtoverlay=pi3-miniuart-bt
 ```
 
-HUSBZB-1:
+For very special device, the `/dev/ttyAMA0` will not by udev and not mapped to docker. So you need explicit set this device for mapping to Home-Assistant. Execute this command on ssh add-on:
+```bash
+$ curl -d '{"devices": "/dev/ttyAMA0"}' http://172.17.0.2/homeassistant/options
+```
+
+### HUSBZB-1:
 ```yaml
 zwave:
   usb_path: /dev/ttyUSB0