diff --git a/CONTRIBUTORS.rst b/CONTRIBUTORS.rst
index 27ab1cf97..0c73eba8b 100644
--- a/CONTRIBUTORS.rst
+++ b/CONTRIBUTORS.rst
@@ -404,6 +404,7 @@ Contributors
 * Eduard Luca
 * Kiril Staikov
 * Saptak Sengupta
+* Dawid Bugajewski
 
 Translators
 ===========
diff --git a/docs/advanced_topics/customisation/extending_draftail.rst b/docs/advanced_topics/customisation/extending_draftail.rst
index c115c52c5..6376e6537 100644
--- a/docs/advanced_topics/customisation/extending_draftail.rst
+++ b/docs/advanced_topics/customisation/extending_draftail.rst
@@ -105,7 +105,7 @@ Blocks are nearly as simple as inline styles:
         )
 
         features.register_converter_rule('contentstate', feature_name, {
-            'from_database_format': {'div.help-text': BlockElementHandler(type_)},
+            'from_database_format': {'div[class=help-text]': BlockElementHandler(type_)},
             'to_database_format': {'block_map': {type_: {'element': 'div', 'props': {'class': 'help-text'}}}},
         })