A.T. Robertson Commentary Luke 23:41

"And we indeed justly; for we receive the due reward of our deeds: but this man hath done nothing amiss." — Luke 23:41 (ASV)

Nothing amiss (ουδεν ατοπον). Nothing out of place (α privative, τοπος, place). Old word, three times in the N.T. (Luke 23:44; Acts 28:6; 2 Thessalonians 3:2). This can only mean that this robber accepts the claims of Jesus to be true. He is dying for claiming to be Messiah, as he is.