diff --git a/lib/restclient/exceptions.rb b/lib/restclient/exceptions.rb
index <HASH>..<HASH> 100644
--- a/lib/restclient/exceptions.rb
+++ b/lib/restclient/exceptions.rb
@@ -107,6 +107,10 @@ module RestClient
       end
     end
 
+    def http_headers
+      @response.headers if @response
+    end
+
     def http_body
       @response.body if @response
     end
Add Exception#http_headers for parallelism.

This closely matches the behavior of `#http_body`. Though I suspect we
have a documentation problem if people aren't aware of `#response`.