diff --git a/src/main/wacc/Frontend/microWacc.scala b/src/main/wacc/Frontend/microWacc.scala
index a19567e..d0b6f9d 100644
--- a/src/main/wacc/Frontend/microWacc.scala
+++ b/src/main/wacc/Frontend/microWacc.scala
@@ -14,6 +14,7 @@ object microWacc {
   case class BoolLiter(v: Boolean) extends Expr(KnownType.Bool)
   case class CharLiter(v: Char) extends Expr(KnownType.Char)
   case class ArrayLiter(elems: List[Expr])(ty: SemType) extends Expr(ty)
+  case class NullLiter()(ty: SemType) extends Expr(ty)
   case class Ident(name: String)(identTy: SemType)
       extends Expr(identTy)
       with CallTarget(identTy)