diff --git a/src/browser/ui/dom/HTMLDOMPropertyConfig.js b/src/browser/ui/dom/HTMLDOMPropertyConfig.js
index a90efde791..0cd3aa369c 100644
--- a/src/browser/ui/dom/HTMLDOMPropertyConfig.js
+++ b/src/browser/ui/dom/HTMLDOMPropertyConfig.js
@@ -164,7 +164,7 @@ var HTMLDOMPropertyConfig = {
     // keyboard hints.
     autoCapitalize: null,
     autoCorrect: null,
-    // itemProp, itemScope, itemType, itemType, itemID are for
+    // itemProp, itemScope, itemType are for
     // Microdata support. See http://schema.org/docs/gs.html
     itemProp: MUST_USE_ATTRIBUTE,
     itemScope: MUST_USE_ATTRIBUTE | HAS_BOOLEAN_VALUE,