diff --git a/acorn.js b/acorn.js
index 7ab963e2f0..f9321ecfe7 100644
--- a/acorn.js
+++ b/acorn.js
@@ -1848,10 +1848,6 @@
       case "SpreadElement":
         break;
 
-      case "ParenthesizedExpression":
-        checkLVal(expr.expression);
-        break;
-
       default:
       raise(expr.start, "Assigning to rvalue");
   }