diff --git a/res/cardsfolder/a/akki_underminer.txt b/res/cardsfolder/a/akki_underminer.txt
index 6b5484c6b29..cc347662048 100644
--- a/res/cardsfolder/a/akki_underminer.txt
+++ b/res/cardsfolder/a/akki_underminer.txt
@@ -3,7 +3,8 @@ ManaCost:3 R
 Types:Creature Goblin Rogue Shaman
 PT:1/1
 T:Mode$ DamageDone | ValidSource$ Card.Self | ValidTarget$ Opponent | CombatDamage$ True | Execute$ TrigSac | TriggerZones$ Battlefield | TriggerDescription$ Whenever CARDNAME deals combat damage to a player, that player sacrifices a permanent.
-SVar:TrigSac:AB$Sacrifice | Cost$ 0 | Defined$ TriggeredTarget | SacValid$ Permanent
+SVar:TrigSac:AB$ Sacrifice | Cost$ 0 | Defined$ TriggeredTarget | SacValid$ Permanent
+SVar:MustBeBlocked:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/akki_underminer.jpg
 Oracle:Whenever Akki Underminer deals combat damage to a player, that player sacrifices a permanent.
 SetInfo:CHK Uncommon
\ No newline at end of file