diff --git a/doc/ros_2.md b/doc/ros_2.md
index 8f889df..f4c5cfc 100644
--- a/doc/ros_2.md
+++ b/doc/ros_2.md
@@ -179,8 +179,8 @@ sequenceDiagram
     Note over rmw: copies available message to msg if there is one
     opt RCL_RET_OK == ret
         Executor->>Subscription: handle_message(msg)
-        Note over Subscription: makes sure it's the right type (intra/inter process), then casts the message to its actual type
-        Subscription->>AnySubscriptionCallback: dispatch(msg)
+        Note over Subscription: casts msgs to its actual type
+        Subscription->>AnySubscriptionCallback: dispatch(typed_msg)
         AnySubscriptionCallback->>tracetools: TP(rclcpp_subscription_callback_start, this, is_intra_process)
         Note over AnySubscriptionCallback: std::function::operator(...)
         AnySubscriptionCallback->>tracetools: TP(rclcpp_subscription_callback_end, this)