diff --git a/man7/sched.7 b/man7/sched.7
index d4ccff47a..6f85ac9cd 100644
--- a/man7/sched.7
+++ b/man7/sched.7
@@ -33,6 +33,10 @@
 .SH NAME
 sched \- overview of CPU scheduling
 .SH DESCRIPTION
+Since Linux 2.6.23, the default scheduler is CFS,
+the "Completely Fair Scheduler".
+The CFS scheduler replaced the earlier "O(1)" scheduler.
+.\"
 .SS API summary
 Linux provides the following system calls for controlling
 the CPU scheduling behavior, policy, and priority of processes