diff --git a/lib/restclient/abstract_response.rb b/lib/restclient/abstract_response.rb
index f6ad4d2..8831ebb 100644
--- a/lib/restclient/abstract_response.rb
+++ b/lib/restclient/abstract_response.rb
@@ -47,7 +47,7 @@ module RestClient
       elsif Exceptions::EXCEPTIONS_MAP[code]
         raise Exceptions::EXCEPTIONS_MAP[code].new(self, code)
       else
-        raise RequestFailed self
+        raise RequestFailed, self
       end
     end