diff --git a/src/Auth/Db.php b/src/Auth/Db.php
index 101413b..3f6ca9e 100644
--- a/src/Auth/Db.php
+++ b/src/Auth/Db.php
@@ -84,6 +84,10 @@ class Db extends Backend {
       )
     );
     self :: $dsn = App::get('auth.db.dsn', null, 'string');
+    if (!self :: $dsn) {
+      Log :: warning('No database DSN configured, can not initialize this authentication backend');
+      return false;
+    }
     self :: $user = App::get('auth.db.user', null, 'string');
     self :: $password = App::get('auth.db.password', null, 'string');
     self :: $options = App::get('auth.db.options', null, 'array');
@@ -91,7 +95,7 @@ class Db extends Backend {
     self :: $username_field = App::get('auth.db.username_field', null, 'string');
     self :: $password_field = App::get('auth.db.password_field', null, 'string');
     self :: $exposed_fields = App::get('auth.db.exposed_fields', null, 'array');
-    return boolval(self :: $dsn);
+    return true;
   }
 
   /**