subject-verb agreement

Hi is this sentence correct?

The client prefers that he speak with the technician personally.

should it be speak or speaks?

Compare it with:
The client prefers to speak with the technician personally.
There ‘that he speak’ can be replaced with ‘to speak’ so the modified version without the ‘s’ is acceptable.

do you say that the version above (that he speak) is also acceptable?

Yes, that’s what I mean.

that means using [speaks] in the sentence is incorrect? I thougt the sentence has a singular subject?!

He will speak to the technician. (in the future)

ok that was helpful, big thanks![/code]

In the original sentence, “speak” is a subunctive form. That’s why it’s not “speaks”.