diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/builder/FactoryAdapter.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/builder/FactoryAdapter.kt
index 19f3c41f..6ec515da 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/builder/FactoryAdapter.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/io/json/builder/FactoryAdapter.kt
@@ -408,7 +408,7 @@ class FactoryAdapter<T : Any> private constructor(
 
 			return FactoryAdapter(
 				bound = clazz,
-				types = types.stream().map { it.resolve(gson) }.collect(ImmutableList.toImmutableList()),
+				types = ImmutableList.copyOf(types.map { it.resolve(gson) }),
 				asJsonArray = asList,
 				storesJson = storesJson,
 				logMisses = logMisses,