diff --git a/lib/noosfero/api/session.rb b/lib/noosfero/api/session.rb
index bcbddb2..3178fa6 100644
--- a/lib/noosfero/api/session.rb
+++ b/lib/noosfero/api/session.rb
@@ -45,6 +45,7 @@ module Noosfero
       end
 
       post "/login_from_cookie" do
+        return unauthorized! if cookies[:auth_token].blank?
         user = User.where(remember_token: cookies[:auth_token]).first
         return unauthorized! unless user && user.activated?
         @current_user = user
--
libgit2 0.21.2