diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/BuilderAdapter.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/BuilderAdapter.kt
index 6bd8aba9..c859d69e 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/BuilderAdapter.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/BuilderAdapter.kt
@@ -88,7 +88,7 @@ class BuilderAdapter<T : Any> private constructor(
 		@Suppress("name_shadowing")
 		var reader = reader
 
-		val missing = ObjectArraySet<WrappedProperty<T, *>>()
+		val missing = ObjectOpenHashSet<WrappedProperty<T, *>>()
 		missing.addAll(properties.values)
 
 		val instance = factory.invoke()