diff --git a/man2/clone.2 b/man2/clone.2
index 2c600d268..a03f5f416 100644
--- a/man2/clone.2
+++ b/man2/clone.2
@@ -333,6 +333,7 @@ signal.
 .I "From Linux 2.6.25 this flag is deprecated."
 You probably never wanted to use it,
 you certainly shouldn't be using it, and soon it will go away.
+.\" glibc 2.8 removed this defn from bits/sched.h
 .TP
 .B CLONE_VFORK
 If