diff --git a/man3/argz_add.3 b/man3/argz_add.3
index 4b2de7c72..a571903a5 100644
--- a/man3/argz_add.3
+++ b/man3/argz_add.3
@@ -195,6 +195,35 @@ All argz functions that do memory allocation have a return type of
 and return 0 for success, and
 .B ENOMEM
 if an allocation error occurs.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbw33 lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.BR argz_add (),
+.BR argz_add_sep (),
+.br
+.BR argz_append (),
+.BR argz_count (),
+.br
+.BR argz_create (),
+.BR argz_create_sep (),
+.br
+.BR argz_delete (),
+.BR argz_extract (),
+.br
+.BR argz_insert (),
+.BR argz_next (),
+.br
+.BR argz_replace (),
+.BR argz_stringify ()
+T}	Thread safety	MT-Safe
+.TE
+
 .SH CONFORMING TO
 These functions are a GNU extension.
 Handle with care.