Burnley midfielder David Jones admits frustration after blowing a two goal lead to draw 2-2 with West Bromwich Albion.
Burnley have conceded 11 goals in their past four games, and six in two games to West Brom, who beat them 4-0 at The Hawthorns in September.
Jones said: "They're things that you look to tighten up on and you work on them.
"They troubled us earlier in the season at The Hawthorns with the set-pieces and twice again here. But we'll work on it and look to go again on Wednesday (against Manchester United).
"There's little things that are not quite right but the performance was decent. Maybe we were a little bit edgy defending the set-pieces but we're more than capable. We've been defending them well recently and it's just disappointing."
