diff --git a/gemp-lotr/gemp-lotr-async/src/main/web/includes/changeLog.html b/gemp-lotr/gemp-lotr-async/src/main/web/includes/changeLog.html
index 310550a88..4b2f6762c 100644
--- a/gemp-lotr/gemp-lotr-async/src/main/web/includes/changeLog.html
+++ b/gemp-lotr/gemp-lotr-async/src/main/web/includes/changeLog.html
@@ -35,6 +35,7 @@
 - "Burglar's Contract" can now be used in Skirmish.
 - "Crazy Cob" can now also play minions when Orcs are killed.
 - "Great Barricade" now allows to exert only companions, and doesn't crash the game, if there is a Dwarf follower present.
+- "Ancestral Knowledge" no longer crashes the game, when a Dwarf follower is present.
 
 <b>17 Dec. 2015</b>
 - "Armor of Khazad" no longer allows to return itself from discard and can now be transferred.
diff --git a/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set30/dwarven/Card30_001.java b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set30/dwarven/Card30_001.java
index 82991a82e..36d902290 100644
--- a/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set30/dwarven/Card30_001.java
+++ b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set30/dwarven/Card30_001.java
@@ -6,6 +6,7 @@ import com.gempukku.lotro.cards.actions.PlayEventAction;
 import com.gempukku.lotro.cards.effects.choose.ChooseAndDiscardCardsFromPlayEffect;
 import com.gempukku.lotro.cards.effects.choose.ChooseAndExertCharactersEffect;
 import com.gempukku.lotro.common.*;
+import com.gempukku.lotro.filters.Filters;
 import com.gempukku.lotro.game.PhysicalCard;
 import com.gempukku.lotro.game.state.LotroGame;
 
@@ -26,7 +27,7 @@ public class Card30_001 extends AbstractEvent {
     @Override
     public boolean checkPlayRequirements(String playerId, LotroGame game, PhysicalCard self, int withTwilightRemoved, int twilightModifier, boolean ignoreRoamingPenalty, boolean ignoreCheckingDeadPile) {
         return super.checkPlayRequirements(playerId, game, self, withTwilightRemoved, twilightModifier, ignoreRoamingPenalty, ignoreCheckingDeadPile)
-                && PlayConditions.canExert(self, game, Race.DWARF);
+                && PlayConditions.canExert(self, game, Race.DWARF, Filters.character);
     }
 
     @Override
@@ -34,7 +35,7 @@ public class Card30_001 extends AbstractEvent {
         int count = PlayConditions.canSpot(game, 4, Side.SHADOW, CardType.CONDITION) ? 2 : 1;
         final PlayEventAction action = new PlayEventAction(self);
         action.appendCost(
-                new ChooseAndExertCharactersEffect(action, playerId, 1, 1, Race.DWARF));
+                new ChooseAndExertCharactersEffect(action, playerId, 1, 1, Race.DWARF, Filters.character));
         action.appendEffect(
                 new ChooseAndDiscardCardsFromPlayEffect(action, playerId, count, count, CardType.CONDITION));
         return action;