diff --git a/jabberd.spec b/jabberd.spec
index b1bc516..1c05dad 100644
--- a/jabberd.spec
+++ b/jabberd.spec
@@ -1,6 +1,9 @@
+%define jabber_groupid 65438
+%define jabber_userid  65438
+
 Name:          jabberd
 Version:       2.3.2
-Release:       2mamba
+Release:       3mamba
 Summary:       JabberD XMPP Server
 Group:         System/Servers
 Vendor:        openmamba
@@ -87,6 +90,14 @@ MySQL storage support for %{name}.
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
+%pre
+if [ $1 -ge 1 ]; then
+   groupadd jabber -g %{jabber_groupid} 2>/dev/null
+   useradd -u %{jabber_userid} -c 'Jabber service' -d /dev/null -g jabber \
+      -s /bin/false jabber 2>/dev/null
+fi
+exit 0
+
 %post
 %systemd_post jabberd-c2s
 %systemd_post jabberd-router
@@ -101,6 +112,10 @@ MySQL storage support for %{name}.
 %systemd_preun jabberd-s2s
 %systemd_preun jabberd-sm
 %systemd_preun jabberd
+if [ $1 -eq 0 ]; then
+   userdel jabber 2>/dev/null
+   groupdel jabber 2>/dev/null
+fi
 :
 
 %postun
@@ -259,6 +274,9 @@ MySQL storage support for %{name}.
 %doc tools/db-setup.mysql tools/db-update.mysql
 
 %changelog
+* Fri Mar 06 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.2-3mamba
+- create jabber user and group
+
 * Thu Mar 05 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.2-2mamba
 - enable db backend plugins