diff --git a/core/scrollbar.js b/core/scrollbar.js
index 3103f14f0..bdc36f965 100644
--- a/core/scrollbar.js
+++ b/core/scrollbar.js
@@ -276,7 +276,6 @@ Blockly.Scrollbar.prototype.containerVisible_ = true;
 /**
  * Width of vertical scrollbar or height of horizontal scrollbar.
  * Increase the size of scrollbars on touch devices.
- * Don't define if there is no document object (e.g. node.js).
  */
 Blockly.Scrollbar.scrollbarThickness = 15;
 if (goog.events.BrowserFeature.TOUCH_ENABLED) {