diff --git a/yunohost_backup.py b/yunohost_backup.py
index 7efa20b6..ecda902a 100644
--- a/yunohost_backup.py
+++ b/yunohost_backup.py
@@ -38,4 +38,14 @@ def backup_init(helper=False):
         helper -- Init as a helper node rather than a "helped" one
 
     """
-    pass
+    tahoe_cfg_dir = '/usr/share/yunohost/yunohost-config/backup'
+    if helper:
+        configure_cmd = '/configure_tahoe.sh helper'
+    else:
+        configure_cmd = '/configure_tahoe.sh'
+
+    os.system('tahoe create-client /home/yunohost.backup/tahoe')
+    os.system('/bin/bash '+ tahoe_cfg_dir + configure_cmd)
+    os.system('cp '+ tahoe_cfg_dir +'/tahoe.cfg /home/yunohost.backup/tahoe/')
+    os.system('update-rc.d tahoe-lafs defaults')
+    os.system('service tahoe-lafs restart')
diff --git a/yunohost_tools.py b/yunohost_tools.py
index 19d54d5d..fd1d53be 100644
--- a/yunohost_tools.py
+++ b/yunohost_tools.py
@@ -34,6 +34,7 @@ import json
 from yunohost import YunoHostError, YunoHostLDAP, validate, colorize, get_required_args, win_msg
 from yunohost_domain import domain_add
 from yunohost_dyndns import dyndns_subscribe
+from yunohost_backup import backup_init
 
 def tools_ldapinit(password=None):
     """
@@ -287,6 +288,9 @@ def tools_postinstall(domain, password, dyndns=False):
         # Change LDAP admin password
         tools_adminpw(old_password='yunohost', new_password=password)
 
+        # Initialize backup system
+        backup_init()
+
         os.system('touch /etc/yunohost/installed')
         os.system('service samba restart')