  Let $\mathscr{B}^+(G)$ be the bicyclic extension of a totally ordered group
$G$ which is defined in [O. Gutik, D. Pagon, and K. Pavlyk, Congruences on
bicyclic extensions of a linearly ordered group, Acta Comment. Univ. Tartu.
Math. 15 (2011), no. 2, 61-80, (arXiv:1111.2401)]. We show that if $G$ and $H$
are archimedean totally ordered groups then every $o$-homomorphism
$\widehat{\varphi}\colon G\to H$ generates a monoid homomorphim
$\widetilde{\varphi}\colon \mathscr{B}^+(G)\to \mathscr{B}^+(H)$, and every
monoid homomorphism $\widetilde{\varphi}\colon \mathscr{B}^+(G)\to
\mathscr{B}^+(H)$ generates $o$-homomorphism $\widehat{\varphi}\colon G\to H$.
