Liz Kendall has said everyone must accept Jeremy Corbyn as Labour leader if he wins on Saturday.
Leadership candidate Kendall made the remarks in her final speech before the ballot closes this afternoon.
She admitted her competitor Corbyn had been successful in "mobilising huge numbers of people" and interesting them in the vote.
But she said: "The program of Jeremy Corbyn is not new. It is the same as he had in the 80s and will give us the same result."
Stating that there were three huge challenges - leading and uniting the party, taking on the Tories and regaining the public's trust - ahead for the next leader, Kendall added the party needed to "seriously reflect" in the coming months.
Is Sadiq Khan's Mayor of London candidacy a step to the left for the Labour Party and a boost for leadership front-runner Jeremy Corbyn?
On the eve of the new Labour party leader result, David Cameron brands the party "a clear threat to the security of British families".
Labour leadership hopeful Andy Burnham has denied taking cash for access from an undercover journalist posing as a foreign donor.