--- Libc/Libc-262/gen/sysconf.3
+++ Libc/Libc-320/gen/sysconf.3
@@ -85,6 +85,9 @@
 The maximum number of supplemental groups.
 .It Li _SC_OPEN_MAX
 The maximum number of open files per user id.
+.It Li _SC_PAGESIZE
+The memory page size of the system expressed in bytes.
+This is the fundamental unit of memory management of the operating system.
 .It Li _SC_STREAM_MAX
 The minimum maximum number of streams that a process may have open
 at any one time.