diff --git a/src/main/wacc/ast.scala b/src/main/wacc/ast.scala
index 16d983c..b46c9c5 100644
--- a/src/main/wacc/ast.scala
+++ b/src/main/wacc/ast.scala
@@ -20,6 +20,9 @@ object ast {
   sealed trait Expr5 extends Expr4
   sealed trait Expr6 extends Expr5
 
+  case class Parens(expr: Expr) extends Expr6
+  object Parens extends ParserBridge1[Expr, Parens]
+
   case class IntLiter(v: Int) extends Expr6
   object IntLiter extends ParserBridge1[Int, IntLiter]