diff --git a/lib/6to5/types/index.js b/lib/6to5/types/index.js
index 6e21d7c50f..1b40721c2c 100644
--- a/lib/6to5/types/index.js
+++ b/lib/6to5/types/index.js
@@ -318,7 +318,7 @@ t.isReferenced = function (node, parent) {
   // no: [NODE = foo] = [];
   // yes: [foo = NODE] = [];
   if (t.isAssignmentPattern(parent)) {
-    return parent.right !== node;
+    return parent.right === node;
   }
 
   // no: [NODE] = [];
@@ -348,8 +348,8 @@ t.isReferenced = function (node, parent) {
 /**
  * Check if the input `node` is an `Identifier` and `isReferenced`.
  *
- * @param {Object} node
- * @param {Object} parent
+ * @param {Node} node
+ * @parma {Node} parent
  * @returns {Boolean}
  */