Early Modern English

I think it can be made grammatically correct just by adding an "if". I'm basing this off the fact that I've found some examples of "if he/she/it mean" in some EME texts:

... if he mean as he speaketh.
_{The Historie of Great Britain Under the Conquests of the Romans, Saxons, Danes and Normans, 1623}

And if it mean the united Kingdom of Great Britain, many think it must infer an owning and acknowledgement of the Treaty of Union...
_{The Oath of Abjuration Displayed, 1712}

If it mean a just action, surely a just action is no indulgence. If it mean an unjust action...
_{A Narrative of Facts, Relating to a Prosecution for High Treason, 1795}

I'm pretty sure this is just the subjunctive, which is still sometimes used today (despite how weird it may sound).

Judging from other examples I found, it would also be OK to say "if it means", but this would lose some of the archaic flavor ;)