diff --git a/man3/signbit.3 b/man3/signbit.3
index 3c72bd225..f213d6a3c 100644
--- a/man3/signbit.3
+++ b/man3/signbit.3
@@ -59,10 +59,17 @@ is negative; otherwise it returns zero.
 .SH ERRORS
 No errors occur.
 .SH ATTRIBUTES
-.SS Multithreading (see pthreads(7))
-The
+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 signbit ()
-macro is thread-safe.
+T}	Thread safety	MT-Safe
+.TE
 .SH CONFORMING TO
 C99, POSIX.1-2001.
 This function is defined in IEC 559 (and the appendix with