[tlhIngan Hol] how is the {mapIm ngIq maH} correct ?

Read the following non-Ca'Non sentence from dsc: dsc "Battle at the Binary Stars"

{mapIm ngIq maH 'e' luQaw'meH ghoS chaH} They come to destroy our individuality.

I know that this sentence is non-Ca'Non, but there's something I wonder.. Isn't the {ngIq maH} third person ? So, how can we have the {ma-} on the {pIm} ? Doesn't this violate the accord rule, or however the @!#! you call it, when the verb prefix doesn't agree with its' subject ? ~ bara'qa'