--- Libc/Libc-583/sys/pthread_sigmask.2
+++ Libc/Libc-262/sys/pthread_sigmask.2
@@ -33,13 +33,10 @@
 .Nm pthread_sigmask
 .Nd examine and/or change a thread's signal mask
 .Sh SYNOPSIS
+.In pthread.h
 .In signal.h
 .Ft int
-.Fo pthread_sigmask
-.Fa "int how"
-.Fa "const sigset_t *restrict set"
-.Fa "sigset_t *restrict oset"
-.Fc
+.Fn pthread_sigmask "int how" "const sigset_t *set" "sigset_t *oset"
 .Sh DESCRIPTION
 The
 .Fn pthread_sigmask
@@ -85,20 +82,13 @@
 .Fa how
 is not one of the defined values.
 .El
-.Sh LEGACY SYNOPSIS
-.Fd #include <pthread.h>
-.Fd #include <signal.h>
-.Pp
-The include file
-.In pthread.h
-is necessary.
 .Sh SEE ALSO
 .Xr sigaction 2 ,
 .Xr sigpending 2 ,
 .Xr sigprocmask 2 ,
 .Xr sigsuspend 2 ,
-.Xr sigsetops 3 ,
-.Xr compat 5
+.Xr sigsetops 3
 .Sh STANDARDS
 .Fn pthread_sigmask
 conforms to ISO/IEC 9945-1:1996 (``POSIX.1'')
+