diff --git a/src/babel/traversal/scope/index.js b/src/babel/traversal/scope/index.js
index e96756c6b7..aed9362928 100644
--- a/src/babel/traversal/scope/index.js
+++ b/src/babel/traversal/scope/index.js
@@ -46,7 +46,7 @@ var programReferenceVisitor = {
     }
   },
 
-  ForXStatement(node, parent, scope, state) {
+  ForXStatement(node, parent, scope) {
     var left = this.get("left");
     if (left.isPattern() || left.isIdentifier()) {
       scope.registerConstantViolation(left);