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-rw-r--r--actionpack/lib/action_dispatch/http/response.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index ff5e96fdf7..a5d082c6a2 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -43,6 +43,7 @@ module ActionDispatch # :nodoc:
@writer = lambda { |x| @body << x }
@block = nil
@length = 0
+ @_etag = nil
@status, @header = status, header
self.body = body