diff --git a/Doc/library/asyncio-future.rst b/Doc/library/asyncio-future.rst
index 43977de273e61f..38ece53c4d898d 100644
--- a/Doc/library/asyncio-future.rst
+++ b/Doc/library/asyncio-future.rst
@@ -15,6 +15,12 @@ Futures
 *Future* objects are used to bridge **low-level callback-based code**
 with high-level async/await code.
 
+.. note::
+
+   Some of the future functions and the future object use an
+   optional argument *loop* that takes an object of :class:`EventLoop`
+   to denote which event loop the future is using. By default *loop*
+   is set to the event loop that is currently running.
 
 Future Functions
 ================