diff --git a/tools.py b/tools.py
index 173a4fee0..fb09935e9 100644
--- a/tools.py
+++ b/tools.py
@@ -316,7 +316,7 @@ def tools_postinstall(domain, password, ignore_dyndns=False):
     app_ssowatconf(auth)
 
     # Change LDAP admin password
-    tools_adminpw(old_password='yunohost', new_password=password)
+    tools_adminpw(auth, password)
 
     # Enable UPnP silently and reload firewall
     firewall_upnp('enable', no_refresh=True)