diff --git a/man3/abs.3 b/man3/abs.3
index 1abc23151..7a7576465 100644
--- a/man3/abs.3
+++ b/man3/abs.3
@@ -79,6 +79,15 @@ appropriate integer type for the function.
 .SH RETURN VALUE
 Returns the absolute value of the integer argument, of the appropriate
 integer type for the function.
+.SH ATTRIBUTES
+.SS Multithreading (see pthreads(7))
+The
+.BR abs (),
+.BR labs (),
+.BR llabs (),
+and
+.BR imaxabs ()
+functions are thread-safe.
 .SH CONFORMING TO
 SVr4, POSIX.1-2001, 4.3BSD, C99.
 .\" POSIX.1 (1996 edition) requires only the