diff --git a/debian/ai-auth-server.conf b/debian/ai-auth-server.conf
index fc4dd8514ece3f7460fe5666c2085523e160dda6..a48b726d40b7215e0b4b07a9019ca40c0e9dce1f 100644
--- a/debian/ai-auth-server.conf
+++ b/debian/ai-auth-server.conf
@@ -18,7 +18,7 @@ LDAP_SERVICE_MAP = {
     # DAV access (webdav fcgi handler).
     'dav': {
         'base': 'ou=People, dc=investici, dc=org, o=Anarchy',
-        'filter': '(&(objectClass=ftpAccount)(status=active)(host=%(shard)s)(ftpname=%%(user)s))' % host,
+        'filter': '(&(objectClass=ftpAccount)(status=active)(host=%(shard)s)(ftpname=%(user)s)',
     },
 
     # Main account (pannello).