You have a better than normal chance to resist turning.
Prerequisite: Undead creature type.
Benefit: You are less easily affected by clerics or paladins than you normally would be (see Turn and Rebuke Undead). When resolving a turn, rebuke, command, or bolster attempt, add 4 to your character level (monster Hit Dice plus class levels) to determine your Hit Dice for turn, rebuke, command, and bolster attempts. For example, a 4 HD wight with this feat is treated as ап 8 HD undead for the purpose of turn, rebuke, command, and bolster attempts, even though it is a 4 HD creature for any other purpose.
Source: Savage Species, page 36.