diff --git a/FreeBSD-Upgrade.md b/FreeBSD-Upgrade.md
index 6fda549..123f4a6 100644
--- a/FreeBSD-Upgrade.md
+++ b/FreeBSD-Upgrade.md
@@ -21,4 +21,10 @@ Basejail updaten
 ezjail-admin update -i
 Jails Mergemastern
 mergemaster -D /usr/jails/<jailfoo> -U
+```
+
+Allow shared memory for postgres:
+
+```
+sudo jail -m jid=1 allow.sysvipc=1
 ```
\ No newline at end of file