diff --git a/src/core/interface.scala b/src/core/interface.scala
index 161caaf8..7268450c 100644
--- a/src/core/interface.scala
+++ b/src/core/interface.scala
@@ -85,10 +85,10 @@ object SealedTrait:
                 val annotations: IArray[Any],
                 val typeAnnotations: IArray[Any],
                 val isObject: Boolean,
-                index: Int,
-                callByNeed: CallByNeed[Typeclass[SType]],
-                isType: Type => Boolean,
-                asType: Type => SType & Type
+                val index: Int,
+                val callByNeed: CallByNeed[Typeclass[SType]],
+                val isType: Type => Boolean,
+                val asType: Type => SType & Type
                ) extends PartialFunction[Type, SType & Type], Serializable:
     def typeclass: Typeclass[SType & Type] = callByNeed.value.asInstanceOf[Typeclass[SType & Type]]
     def cast: PartialFunction[Type, SType & Type] = this
@@ -109,4 +109,4 @@ final class CallByNeed[+A](private[this] var eval: () => A) extends Serializable
   lazy val value: A =
     val result = eval()
     eval = null
-    result
\ No newline at end of file
+    result