Order of the Sword - Mounted Mastery - Mount's Str modifier on damage rolls

[Jadeite]

Quote:

When making such an attack, he can add his mount's Strength modifier to the damage roll, in addition to his own.

Is this a flat bonus or is this multiplied with 1,5 when wielding a two-handed weapon?

[Andrew Phillips]

First, great idea for the ability, Second seems pretty clear to me the it is not 1.5x, but better woring is always possible.