S. Garc\'{\i}a-Ferreira and H. Ohta gave a construction 
that was intended to produce a $\tau$-pseudocompact space, 
which has a regular-closed zero set $A$ 
and a regular-closed $C$-embedded set $B$ such 
that neither $A$ nor $B$ is $\tau$-pseudocompact. 
We show that although their  sets $A$, $B$  are not regular-closed, 
there are at least two ways to make their construction work 
to give the desired example.