(GH1841) fixes concat error
(GH1841) fixes concat error

cormacmccarthy/fuelux,vernak2539/fuelux,ExactTarget/fuelux,futuremint/fuelux,ExactTarget/fuelux,afz/fuelux,cormacmccarthy/fuelux,vernak2539/fuelux,swilliamset/fuelux,swilliamset/fuelux,afz/fuelux,futuremint/fuelux