diff --git a/spec/acceptance/typhoeus/typhoeus_hydra_spec_helper.rb b/spec/acceptance/typhoeus/typhoeus_hydra_spec_helper.rb
index 9a8a3e246..1252f39fa 100644
--- a/spec/acceptance/typhoeus/typhoeus_hydra_spec_helper.rb
+++ b/spec/acceptance/typhoeus/typhoeus_hydra_spec_helper.rb
@@ -25,7 +25,7 @@ def http_request(method, uri, options = {}, &block)
     raise FakeTyphoeusHydraConnectError.new if response.code == 0
     OpenStruct.new({
       :body => response.body,
-      :headers => WebMock::Util::Headers.normalize_headers(join_array_values(response.headers_hash)),
+      :headers => WebMock::Util::Headers.normalize_headers(join_array_values(response.header)),
       :status => response.code.to_s,
       :message => response.status_message
     })