diff --git a/src/main/java/de/ellpeck/actuallyadditions/mod/misc/DungeonLoot.java b/src/main/java/de/ellpeck/actuallyadditions/mod/misc/DungeonLoot.java
index 1b238f312..d9047b3c1 100644
--- a/src/main/java/de/ellpeck/actuallyadditions/mod/misc/DungeonLoot.java
+++ b/src/main/java/de/ellpeck/actuallyadditions/mod/misc/DungeonLoot.java
@@ -93,6 +93,7 @@ public class DungeonLoot{
                 addBook = true;
                 addQuartz = true;
                 addBatWings = true;
+                addCrystals = true;
 
                 pool.addEntry(new LootEntryItem(Items.BOOK, 90, 0, new LootFunction[0], noCondition, ModUtil.MOD_ID+":book"));