I think the single was rushed out to cash in on Marvin's album and probably nothing else new was available. The UK 45 has Amen and Keep on pushing on the flip. I've had a search running on Ebay for yonks to upgrade my copy but am still waiting.....It failed to chart (R&Bwise) in the US which is unusual for an Impressions 45 so would guess that Marvin's version swamped it when it was issued.