diff --git a/res/cardsfolder/s/spectral_prison.txt b/res/cardsfolder/s/spectral_prison.txt
index 4f7a8644590..8561ed6609a 100644
--- a/res/cardsfolder/s/spectral_prison.txt
+++ b/res/cardsfolder/s/spectral_prison.txt
@@ -3,7 +3,7 @@ ManaCost:1 U
 Types:Enchantment Aura
 Text:no text
 K:Enchant creature
-A:SP$ Attach | Cost$ 1 U | ValidTgts$ Creature | IsCurse$ True
+A:SP$ Attach | Cost$ 1 U | ValidTgts$ Creature | AILogic$ Curse
 S:Mode$ Continuous | Affected$ Creature.EnchantedBy | AddHiddenKeyword$ HIDDEN CARDNAME doesn't untap during your untap step. | Description$ Enchanted creature doesn't untap during its controller's untap step.
 T:Mode$ SpellCast | TargetsValid$ Card.EnchantedBy | TriggerZones$ Battlefield | Execute$ TrigSac | TriggerDescription$ Whenever enchanted creature becomes the target of a spell, sacrifice CARDNAME.
 SVar:TrigSac:AB$Sacrifice | Cost$ 0 | Defined$ Self