diff --git a/man3/pthread_tryjoin_np.3 b/man3/pthread_tryjoin_np.3
index 4fef86c65..acce53714 100644
--- a/man3/pthread_tryjoin_np.3
+++ b/man3/pthread_tryjoin_np.3
@@ -117,6 +117,20 @@ never returns the error
 .BR EINTR .
 .SH VERSIONS
 These functions first appeared in glibc in version 2.3.3.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbw22 lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.BR pthread_tryjoin_np (),
+.BR pthread_timedjoin_np ()
+T}	Thread safety	MT-Safe
+.TE
+
 .SH CONFORMING TO
 These functions are nonstandard GNU extensions;
 hence the suffix "_np" (nonportable) in the names.