diff --git a/man2/adjtimex.2 b/man2/adjtimex.2
index 311f095e6..04f18ae0d 100644
--- a/man2/adjtimex.2
+++ b/man2/adjtimex.2
@@ -511,6 +511,18 @@ and
 is done by the kernel in timer context
 Thus, it will take one tick into the second
 for the leap second to be inserted or deleted.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lb lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.BR ntp_adjtime ()
+T}	Thread safety	MT-Safe
+.TE
 .SH CONFORMING TO
 Neither of these interfaces is described in POSIX.1