diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/worldgen/EnhancedPlacedFeature.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/worldgen/EnhancedPlacedFeature.kt
index 6ab25a122..96a1e6d3b 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/worldgen/EnhancedPlacedFeature.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/worldgen/EnhancedPlacedFeature.kt
@@ -33,6 +33,7 @@ import ru.dbotthepony.mc.otm.worldgen.feature.EnhancedFeature
 import ru.dbotthepony.mc.otm.worldgen.placement.EnhancedPlacementModifier
 import java.io.DataOutputStream
 import java.time.Duration
+import java.util.LinkedList
 import kotlin.math.sqrt
 
 private object NodeCodec : Codec<EnhancedPlacedFeature.Node> {
@@ -143,7 +144,7 @@ object EnhancedPlacedFeature : Feature<EnhancedPlacedFeature.Config>(
 			private data class Placement(val context: EnhancedPlacementContext, val positions: BlockPosSet, val feature: EnhancedFeature.Configured<*, *>)
 
 			// TODO: inefficient
-			private val placed = ArrayList<Placement>()
+			private val placed = LinkedList<Placement>()
 
 			override fun place(context: EnhancedPlacementContext, positions: List<BlockPos>, feature: EnhancedFeature.Configured<*, *>) {
 				placed.add(Placement(context, BlockPosSet().also { it.addAll(positions) }, feature))