diff --git a/migration/Iron.rst b/migration/Iron.rst
index f14a5bd90..04691138c 100644
--- a/migration/Iron.rst
+++ b/migration/Iron.rst
@@ -107,3 +107,8 @@ Simple Commander API Allows Multi-Robot Namespacing
 ***************************************************
 
 The Simple Navigator API now allows multi-robot namespacing by exposing a ``namespace`` field in the constructor to allow you to specify the Nav2 stacks' namespace for a robot or system. See `this PR for details <https://github.com/ros-planning/navigation2/pull/3803/files>`_.
+
+Change duration type in wait_action node
+****************************************
+
+In this `PR #3871 <https://github.com/ros-planning/navigation2/pull/3871>`_ the type of duration variable in wait_action node is changed from int to double, which allows you to use floating values for wait_action.
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