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-rw-r--r--actionpack/lib/action_view/helpers/tag_helper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
index 71be2955a8..23777721f6 100644
--- a/actionpack/lib/action_view/helpers/tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -14,7 +14,7 @@ module ActionView
BOOLEAN_ATTRIBUTES = %w(disabled readonly multiple checked autobuffer
autoplay controls loop selected hidden scoped async
defer reversed ismap seemless muted required
- autofocus novalidate formnovalidate open pubdate).to_set
+ autofocus novalidate formnovalidate open pubdate itemscope).to_set
BOOLEAN_ATTRIBUTES.merge(BOOLEAN_ATTRIBUTES.map {|attribute| attribute.to_sym })
PRE_CONTENT_STRINGS = {