diff --git a/core/interfaces/i_autohideable.js b/core/interfaces/i_autohideable.js
index ff976c549..7b1613405 100644
--- a/core/interfaces/i_autohideable.js
+++ b/core/interfaces/i_autohideable.js
@@ -12,7 +12,8 @@
 
 'use strict';
 
-goog.provide('Blockly.IAutoHideable');
+goog.module('Blockly.IAutoHideable');
+goog.module.declareLegacyNamespace();
 
 goog.require('Blockly.IComponent');
 
@@ -22,11 +23,13 @@ goog.require('Blockly.IComponent');
  * @extends {Blockly.IComponent}
  * @interface
  */
-Blockly.IAutoHideable = function() {};
+const IAutoHideable = function() {};
 
 /**
  * Hides the component. Called in Blockly.hideChaff.
  * @param {boolean} onlyClosePopups Whether only popups should be closed.
  *   Flyouts should not be closed if this is true.
  */
-Blockly.IAutoHideable.prototype.autoHide;
+IAutoHideable.prototype.autoHide;
+
+exports = IAutoHideable;
diff --git a/tests/deps.js b/tests/deps.js
index fe97eefd7..c3788886c 100644
--- a/tests/deps.js
+++ b/tests/deps.js
@@ -76,7 +76,7 @@ goog.addDependency('../../core/insertion_marker_manager.js', ['Blockly.Insertion
 goog.addDependency('../../core/interfaces/i_ast_node_location.js', ['Blockly.IASTNodeLocation'], [], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/interfaces/i_ast_node_location_svg.js', ['Blockly.IASTNodeLocationSvg'], ['Blockly.IASTNodeLocation'], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/interfaces/i_ast_node_location_with_block.js', ['Blockly.IASTNodeLocationWithBlock'], ['Blockly.IASTNodeLocation'], {'lang': 'es6', 'module': 'goog'});
-goog.addDependency('../../core/interfaces/i_autohideable.js', ['Blockly.IAutoHideable'], ['Blockly.IComponent']);
+goog.addDependency('../../core/interfaces/i_autohideable.js', ['Blockly.IAutoHideable'], ['Blockly.IComponent'], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/interfaces/i_block_dragger.js', ['Blockly.IBlockDragger'], [], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/interfaces/i_bounded_element.js', ['Blockly.IBoundedElement'], [], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/interfaces/i_bubble.js', ['Blockly.IBubble'], ['Blockly.IContextMenu', 'Blockly.IDraggable'], {'lang': 'es6', 'module': 'goog'});