Index: lib/libc/sys/mprotect.2
===================================================================
--- lib/libc/sys/mprotect.2
+++ lib/libc/sys/mprotect.2
@@ -47,12 +47,14 @@
 changes the specified pages to have protection
 .Fa prot .
 .Pp
-Currently these protection bits are known,
-which can be combined, OR'd together:
+The
+.Fa prot
+argument shall be
+.Dv PROT_NONE
+(No permissions at all)
+or the bitwise OR of one or more of the following values:
 .Pp
 .Bl -tag -width ".Dv PROT_WRITE" -compact
-.It Dv PROT_NONE
-No permissions at all.
 .It Dv PROT_READ
 The pages can be read.
 .It Dv PROT_WRITE
@@ -61,8 +63,11 @@
 The pages can be executed.
 .El
 .Pp
-In addition to these protection flags,
+In addition to these standard protection flags,
+the
 .Fx
+implementation of
+.Fn mprotect
 provides the ability to set the maximum protection of a region
 (which prevents
 .Nm