diff --git a/docs/en/api/messaging.md b/docs/en/api/messaging.md
index 087c971..65ee8f1 100644
--- a/docs/en/api/messaging.md
+++ b/docs/en/api/messaging.md
@@ -133,7 +133,7 @@ Example of a callback:
 

 ```python

 def callback(client, value, *args, **kwargs):

-print(value, args, kwargs)

+    print(value, args, kwargs)

 ```

 

 First argument passed to callback function is an instance of `ConnectionManager`, representing connection by which the message was received.

diff --git a/lib/messaging.py b/lib/messaging.py
index 07609d8..f9bb017 100644
--- a/lib/messaging.py
+++ b/lib/messaging.py
@@ -706,7 +706,7 @@ class ConnectionManager(object):
 
         ```python
         def callback(client, value, *args, **kwargs):
-        print(value, args, kwargs)
+            print(value, args, kwargs)
         ```
 
         First argument passed to callback function is an instance of `ConnectionManager`, representing connection by which the message was received.