diff --git a/doc/CJsonPreprocessor.rst b/doc/CJsonPreprocessor.rst
index 4e7a9e8a..27a06032 100644
--- a/doc/CJsonPreprocessor.rst
+++ b/doc/CJsonPreprocessor.rst
@@ -12,6 +12,13 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 
+
+.. rst-class:: dl-parameters
+
+.. role:: aspect (emphasis)
+.. role:: sep (strong)
+
+
 JsonPreprocessor package
 ========================