diff --git a/core/interfaces/i_copyable.js b/core/interfaces/i_copyable.js
index db3381fae..07556eb23 100644
--- a/core/interfaces/i_copyable.js
+++ b/core/interfaces/i_copyable.js
@@ -14,12 +14,12 @@
 goog.module('Blockly.ICopyable');
 goog.module.declareLegacyNamespace();
 
-goog.requireType('Blockly.ISelectable');
-goog.requireType('Blockly.WorkspaceSvg');
+const ISelectable = goog.requireType('Blockly.ISelectable');
+const WorkspaceSvg = goog.requireType('Blockly.WorkspaceSvg');
 
 
 /**
- * @extends {Blockly.ISelectable}
+ * @extends {ISelectable}
  * @interface
  */
 const ICopyable = function() {};
@@ -34,7 +34,7 @@ ICopyable.prototype.toCopyData;
  * Copy Metadata.
  * @typedef {{
  *            xml:!Element,
- *            source:Blockly.WorkspaceSvg,
+ *            source:WorkspaceSvg,
  *            typeCounts:?Object
  *          }}
  */