1 files changed, 7 insertions, 6 deletions
diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
index de08672d2d..2bdd960f4c 100644
--- a/actionpack/lib/action_view/helpers/tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -1,4 +1,3 @@
-require 'cgi'
 require 'erb'
 require 'set'
 
@@ -9,7 +8,7 @@ module ActionView
     module TagHelper
       include ERB::Util
 
-      BOOLEAN_ATTRIBUTES = %w(disabled readonly multiple).to_set
+      BOOLEAN_ATTRIBUTES = %w(disabled readonly multiple checked).to_set
       BOOLEAN_ATTRIBUTES.merge(BOOLEAN_ATTRIBUTES.map(&:to_sym))
 
       # Returns an empty HTML tag of type +name+ which by default is XHTML
@@ -133,10 +132,12 @@ module ActionView
           unless options.blank?
             attrs = []
             if escape
-              options.each do |key, value|
-                next unless value
-                value = BOOLEAN_ATTRIBUTES.include?(key) ? key : escape_once(value)
-                attrs << %(#{key}="#{value}")
+              options.each_pair do |key, value|
+                if BOOLEAN_ATTRIBUTES.include?(key)
+                  attrs << %(#{key}="#{key}") if value
+                else
+                  attrs << %(#{key}="#{escape_once(value)}") if !value.nil?
+                end
               end
             else
               attrs = options.map { |key, value| %(#{key}="#{value}") }