diff --git a/src/linq/peg/grammar/javascript.pegjs b/src/linq/peg/grammar/javascript.pegjs
index 574f97c..6f5a52a 100644
--- a/src/linq/peg/grammar/javascript.pegjs
+++ b/src/linq/peg/grammar/javascript.pegjs
@@ -272,8 +272,8 @@ QualifiedIdentifier
     	return {
         	type: 'RelationalExpression',
             operator: 'in',
-            left: left,
-            right: right
+            left: right,
+            right: left
         }
     }    
     / !ReservedWord qual:Identifier args:Arguments