diff --git a/lib/svg_types.mli b/lib/svg_types.mli
index a786da522..bd365681d 100644
--- a/lib/svg_types.mli
+++ b/lib/svg_types.mli
@@ -502,6 +502,9 @@ type symbol_content =
 
 type symbol_attr =
   [
+    | core_attr
+    | graphical_event_attr
+    | presentation_attr
     | `Class
     | `Style
     | `ExternalResourcesRequired