diff --git a/Doc/library/sched.rst b/Doc/library/sched.rst
index 957bdd3..d6c86c7 100644
--- a/Doc/library/sched.rst
+++ b/Doc/library/sched.rst
@@ -109,7 +109,8 @@
    on until there are no more scheduled events.
 
    If *blocking* is False executes the scheduled events due to expire soonest
-   (if any) and then return.
+   (if any) and then return the deadline of the next scheduled call in the
+   scheduler (if any).
 
    Either *action* or *delayfunc* can raise an exception.  In either case, the
    scheduler will maintain a consistent state and propagate the exception.  If an