4 files changed, 9 insertions, 5 deletions
diff --git a/actionpack/lib/action_controller/metal/rendering.rb b/actionpack/lib/action_controller/metal/rendering.rb
index 14cc547dd0..32d52c84c4 100644
--- a/actionpack/lib/action_controller/metal/rendering.rb
+++ b/actionpack/lib/action_controller/metal/rendering.rb
@@ -6,7 +6,7 @@ module ActionController
 
     # Before processing, set the request formats in current controller formats.
     def process_action(*) #:nodoc:
-      self.formats = request.formats.map { |x| x.to_sym }
+      self.formats = request.formats.map { |x| x.ref }
       super
     end
 
diff --git a/actionpack/lib/action_dispatch/http/mime_type.rb b/actionpack/lib/action_dispatch/http/mime_type.rb
index 5b87a80c1b..7c9ebe7c7b 100644
--- a/actionpack/lib/action_dispatch/http/mime_type.rb
+++ b/actionpack/lib/action_dispatch/http/mime_type.rb
@@ -216,7 +216,11 @@ module Mime
     end
 
     def to_sym
-      @symbol || @string.to_sym
+      @symbol
+    end
+
+    def ref
+      to_sym || to_s
     end
 
     def ===(list)
diff --git a/actionpack/lib/action_view/lookup_context.rb b/actionpack/lib/action_view/lookup_context.rb
index e434f3b059..06c607931d 100644
--- a/actionpack/lib/action_view/lookup_context.rb
+++ b/actionpack/lib/action_view/lookup_context.rb
@@ -164,11 +164,11 @@ module ActionView
         @frozen_formats = true
       end
 
-      # Overload formats= to reject [:"*/*"] values.
+      # Overload formats= to reject ["*/*"] values.
       def formats=(values)
         if values && values.size == 1
           value = values.first
-          values = nil    if value == :"*/*"
+          values = nil    if value == "*/*"
           values << :html if value == :js
         end
         super(values)
diff --git a/actionpack/lib/action_view/template.rb b/actionpack/lib/action_view/template.rb
index 80543a8b77..96d506fac5 100644
--- a/actionpack/lib/action_view/template.rb
+++ b/actionpack/lib/action_view/template.rb
@@ -123,7 +123,7 @@ module ActionView
       @locals            = details[:locals] || []
       @virtual_path      = details[:virtual_path]
       @updated_at        = details[:updated_at] || Time.now
-      @formats           = Array.wrap(format).map(&:to_sym)
+      @formats = Array.wrap(format).map { |f| f.is_a?(Mime::Type) ? f.ref : f }
     end
 
     # Render a template. If the template was not compiled yet, it is done