Xamarin forms Sqlite WinPhone can't find SQLiteConnection

I'm trying to get a SqLite in my xamarin forms app like shown in this sample

My android and iOS works fine. but windows got some problems. It's like it can't find the type "SQLiteConnection" in the SQLite namespace. and can't find anything about this. I'm target Windows Phone 8.1 and using Xamarin Forms 1.5 (Course of other elements i can't upgrade to Forms 2)

This is my windows Implementation

public class SQLite_WinPhone : ISQLite
    {
        public SQLite_WinPhone() { }
        protected override SQLite.SQLiteConnection GetConnection()
        {
            var sqliteFilename = "TodoSQLite.db3";
            string path = Path.Combine(ApplicationData.Current.LocalFolder.Path, sqliteFilename);
            // Create the connection
            var conn = new SQLite.SQLiteConnection(path);
            // Return the database connection
            return conn;
        }
    }

have any of you out there bump into this before?