diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index e69179b1809c..222299844ad1 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -748,7 +748,10 @@ static ctl_table kern_table[] = {
 		.proc_handler	= &proc_dostring,
 		.strategy	= &sysctl_string,
 	},
-
+/*
+ * NOTE: do not add new entries to this table unless you have read
+ * Documentation/sysctl/ctl_unnumbered.txt
+ */
 	{ .ctl_name = 0 }
 };