diff --git a/azext_iot/_help.py b/azext_iot/_help.py
index 037447203..ddbd697a6 100644
--- a/azext_iot/_help.py
+++ b/azext_iot/_help.py
@@ -954,6 +954,8 @@
       text: az iot device send-d2c-message -n {iothub_name} -d {device_id} --props 'key0=value0;key1=value1'
     - name: Send system properties (Message Id and Correlation Id)
       text: az iot device send-d2c-message -n {iothub_name} -d {device_id} --props '$.mid=<id>;$.cid=<id>'
+    - name: Send custom data by specifying content-type and content-encoding in system properties
+      text: az iot device send-d2c-message -n {iothub_name} -d {device_id} --props '$.ct=<content-type>;$.ce=<content-encoding>' --data {message_body}
 """
 
 helps[