diff --git a/docs/reference/kombu.transport.SQS.rst b/docs/reference/kombu.transport.SQS.rst
index 87e11d28..89cb2a0a 100644
--- a/docs/reference/kombu.transport.SQS.rst
+++ b/docs/reference/kombu.transport.SQS.rst
@@ -26,6 +26,7 @@
 Back-off policy
 ------------------------
 Back-off policy is using SQS visibility timeout mechanism altering the time difference between task retries.
+The mechanism changes message specific ``visibility timeout`` from queue ``Default visibility timeout`` to policy configured timeout.
 The number of retries is managed by SQS (specifically by the ``ApproximateReceiveCount`` message attribute) and no further action is required by the user.
 
 Configuring the queues and backoff policy::