diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/io/KConcreteTypeAdapter.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/io/KConcreteTypeAdapter.kt
index e3b6cbdc..105d3d69 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/io/KConcreteTypeAdapter.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/io/KConcreteTypeAdapter.kt
@@ -238,15 +238,15 @@ class KConcreteTypeAdapter<T : Any> private constructor(
 				val type = param.parameterizedType as? Class<*> ?: continue
 
 				if (type.isPrimitive) {
-					syntheticPrimitives[i] = when (type.name) {
-						"boolean" -> false
-						"int" -> 0
-						"long" -> 0L
-						"short" -> (0).toShort()
-						"byte" -> (0).toByte()
-						"char" -> (0).toChar()
-						"float" -> 0f
-						"double" -> 0.0
+					syntheticPrimitives[i] = when (type) {
+						java.lang.Boolean.TYPE -> false
+						java.lang.Integer.TYPE -> 0
+						java.lang.Long.TYPE -> 0L
+						java.lang.Short.TYPE -> (0).toShort()
+						java.lang.Byte.TYPE -> (0).toByte()
+						java.lang.Character.TYPE -> (0).toChar()
+						java.lang.Float.TYPE -> 0f
+						java.lang.Double.TYPE -> 0.0
 						else -> throw IllegalArgumentException("mamma mia: ${type.name}")
 					}
 				}