diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index fbb306d5f4940f444ae84989028739983a653388..1d91d92fe3618f7a89bb9189bef7c7d8c2eea275 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -747,14 +747,13 @@ psql: could not connect to server: No such file or directory
# sysctl kern.ipc.shmall=32768
# sysctl kern.ipc.shmmax=134217728
-# sysctl kern.ipc.semmap=256
- To have these settings persist over reboots, modify
+ To make these settings persist over reboots, modify
/etc/sysctl.conf.
- The remaining semaphore settings are read-only as far as
+ These semaphore-related settings are read-only as far as
sysctl is concerned, but can be set in
/boot/loader.conf:
@@ -763,7 +762,10 @@ kern.ipc.semmns=512
kern.ipc.semmnu=256
After modifying these values a reboot is required for the new
- settings to take affect.
+ settings to take effect.
+ (Note: FreeBSD does not use SEMMAP>. Older versions
+ would accept but ignore a setting for kern.ipc.semmap>;
+ newer versions reject it altogether.)