1 files changed, 6 insertions, 2 deletions
diff --git a/lib/rdoc/generators/ri_generator.rb b/lib/rdoc/generators/ri_generator.rb
index 4e842d09e9..22467e4ba9 100644
--- a/lib/rdoc/generators/ri_generator.rb
+++ b/lib/rdoc/generators/ri_generator.rb
@@ -96,10 +96,14 @@ module Generators
     end
 
     def generate_class_info(cls)
-      cls_desc = RI::ClassDescription.new
+      if cls === RDoc::NormalModule
+        cls_desc = RI::ClassDescription.new
+        cls_desc.superclass  = cls.superclass
+      else
+        cls_desc = RI::ModuleDescription.new
+      end
       cls_desc.name        = cls.name
       cls_desc.full_name   = cls.full_name
-      cls_desc.superclass  = cls.superclass
       cls_desc.comment     = markup(cls.comment)
 
       cls_desc.attributes =cls.attributes.sort.map do |a|