diff --git a/man2/sched_setaffinity.2 b/man2/sched_setaffinity.2
index d3f3de128..51fd24335 100644
--- a/man2/sched_setaffinity.2
+++ b/man2/sched_setaffinity.2
@@ -36,10 +36,18 @@ affinity mask
 .B #include <sched.h>
 .sp
 .BI "int sched_setaffinity(pid_t " pid ", unsigned int " len ,
-.BI "unsigned long *" mask );
+.BI "cpu_set_t *" mask );
 .sp
 .BI "int sched_getaffinity(pid_t " pid ", unsigned int " len ,
-.BI "unsigned long *" mask );
+.BI "cpu_set_t *" mask );
+.sp
+.BI "CPU_CLR(int " cpu ", cpu_set_t *" set );
+.br
+.BI "CPU_ISSET(int " cpu ", cpu_set_t *" set );
+.br
+.BI "CPU_SET(int " cpu ", cpu_set_t *" set );
+.br
+.BI "CPU_ZERO(cpu_set_t *" set );
 .SH DESCRIPTION
 .BR sched_setaffinity ()
 sets the CPU affinity mask of the process denoted by
@@ -48,8 +56,11 @@ If
 .I pid
 is zero, then the current process is used.
 .sp
-The affinity mask is represented by the bitmask stored in
+The affinity mask is represented by the 
+.I cpu_set_t 
+value pointed to by
 .IR mask .
+
 The least significant bit corresponds to the first logical processor
 number on the system, while the most significant bit corresponds to
 the last logical processor number on the system.
diff --git a/man2/select.2 b/man2/select.2
index dcc7dc9b9..03d1b2952 100644
--- a/man2/select.2
+++ b/man2/select.2
@@ -57,13 +57,13 @@ struct timeval *\fItimeout\fB);
 fd_set *\fIwritefds\fB, fd_set *\fIexceptfds\fB,
 const struct timespec *\fItimeout\fB, const sigset_t *\fIsigmask\fB);
 .sp
-.BI "FD_CLR(int " fd ", fd_set *" set );
+.BI "void FD_CLR(int " fd ", fd_set *" set );
 .br
-.BI "FD_ISSET(int " fd ", fd_set *" set );
+.BI "int FD_ISSET(int " fd ", fd_set *" set );
 .br
-.BI "FD_SET(int " fd ", fd_set *" set );
+.BI "void FD_SET(int " fd ", fd_set *" set );
 .br
-.BI "FD_ZERO(fd_set *" set );
+.BI "void FD_ZERO(fd_set *" set );
 .fi
 .SH DESCRIPTION
 The functions