  Our aim in this paper is to prove that if plurisubharmonic functions $u_1,. .
. , u_n$, $v_1,. . ., v_n$ in the domain of definition of the complex
Monge-Amp\`ere operator on a domain set $D\subset \mathbb{C}^n$ ($n\geq 1$) are
such that $u_1= v_1, . . ., u_n=v_n$ on a Borel plurifinely open set
$\Omega\subset D$, then $$dd^cu_1\wedge ...\wedge dd^cu_n=dd^cv_1\wedge
...\wedge dd^cv_n$$ on $\Omega$. This extends an earlier result obtained by the
author in \cite{EK}.
