diff --git a/core/blocks.js b/core/blocks.js
index fadc629594c..74297b56774 100644
--- a/core/blocks.js
+++ b/core/blocks.js
@@ -19,7 +19,7 @@ goog.module.declareLegacyNamespace();
 
 /**
  * A mapping of block type names to block prototype objects.
- * @type {!Object<string,Object>}
+ * @dict {!Object<string,Object>}
  */
 const Blocks = Object.create(null);