diff --git a/core/input_types.js b/core/input_types.js
index eb9a08a71..8bdc9e504 100644
--- a/core/input_types.js
+++ b/core/input_types.js
@@ -14,7 +14,7 @@
 goog.module('Blockly.inputTypes');
 goog.module.declareLegacyNamespace();
 
-goog.require('Blockly.connectionTypes');
+const connectionTypes = goog.require('Blockly.connectionTypes');
 
 /**
  * Enum for the type of a connection or input.
@@ -22,9 +22,9 @@ goog.require('Blockly.connectionTypes');
  */
 const inputTypes = {
   // A right-facing value input.  E.g. 'set item to' or 'return'.
-  VALUE: Blockly.connectionTypes.INPUT_VALUE,
+  VALUE: connectionTypes.INPUT_VALUE,
   // A down-facing block stack.  E.g. 'if-do' or 'else'.
-  STATEMENT: Blockly.connectionTypes.NEXT_STATEMENT,
+  STATEMENT: connectionTypes.NEXT_STATEMENT,
   // A dummy input.  Used to add field(s) with no input.
   DUMMY: 5
 };