diff --git a/man2/epoll_create.2 b/man2/epoll_create.2
index 09bf960d8..54081cbf8 100644
--- a/man2/epoll_create.2
+++ b/man2/epoll_create.2
@@ -108,6 +108,8 @@ is Linux-specific, and was introduced in kernel 2.5.44.
 Since Linux 2.6.8, the
 .I size
 argument is unused.
+(The kernel dynamically sizes the required data structures
+without needing this initial hint.)
 .SH "SEE ALSO"
 .BR close (2),
 .BR epoll_ctl (2),