Floating Menhir not affected by Crumble

[Vlaid]

Not sure if this is a bug or I am not understanding the Menhir type.

But I used a Svirfneblin Crumbler on one and it didn't make a save or spell resist or any indication that it was affected by it. Pretty sure they are elementals?

[John Doe]

Pretty sure you're right ;)

Description: This spell inflicts 1d6 points of sonic damage per caster level to a selected construct (to a maximum of 15d6).

[putrid_plum]

Crumble is for constructs.

[Vlaid]

Oh. I thought it worked on constructs AND elementals. Ah well. My bad again.