diff --git a/lib/output.js b/lib/output.js
index 79165618..056bdb9c 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -687,10 +687,8 @@ function OutputStream(options) {
         if (p instanceof AST_Unary)
             return true;
         // (yield x).foo
-        if (p instanceof AST_Dot && p.expression === this)
-            return true;
         // (yield x)['foo']
-        if (p instanceof AST_Sub && p.expression === this)
+        if (p instanceof AST_PropAccess && p.expression === this)
             return true;
     });