diff --git a/lib/6to5/traversal/scope.js b/lib/6to5/traversal/scope.js
index 06e878382e..3bbac0dc54 100644
--- a/lib/6to5/traversal/scope.js
+++ b/lib/6to5/traversal/scope.js
@@ -135,7 +135,7 @@ Scope.prototype.generateTempBasedOnNode = function (node) {
 };
 
 Scope.prototype.checkBlockScopedCollisions = function (key, id) {
-  if (this.declarationKinds["let"][key] || this.declarationKinds["const"][key]) {
+  if (this.bindingKinds["let"][key] || this.bindingKinds["const"][key]) {
     throw this.file.errorWithNode(id, "Duplicate declaration " + key, TypeError);
   }
 };
@@ -201,7 +201,7 @@ Scope.prototype.register = function (node, reference, kind) {
     this.bindings[key] = id;
   }
 
-  var kinds = this.declarationKinds[kind];
+  var kinds = this.bindingKinds[kind];
   if (kinds) extend(kinds, ids);
 };
 
@@ -271,7 +271,7 @@ Scope.prototype.crawl = function () {
   }
 
   info = block._scopeInfo = {
-    declarationKinds: {
+    bindingKinds: {
       "const": object(),
       "var":   object(),
       "let":   object()
@@ -400,7 +400,7 @@ Scope.prototype.addDeclarationToFunctionScope = function (kind, node) {
 
   // this ignores the duplicate declaration logic specified in `getInfo`
   // but it doesn't really matter
-  extend(scope.declarationKinds[kind], ids);
+  extend(scope.bindingKinds[kind], ids);
 };
 
 /**
@@ -446,7 +446,7 @@ Scope.prototype.getAllDeclarationsOfKind = function (kind) {
 
   var scope = this;
   do {
-    defaults(ids, scope.declarationKinds[kind]);
+    defaults(ids, scope.bindingKinds[kind]);
     scope = scope.parent;
   } while (scope);