diff --git a/app/indexers/concerns/iiif_print/child_indexer.rb b/app/indexers/concerns/iiif_print/child_indexer.rb
index e91cced9..9235521a 100644
--- a/app/indexers/concerns/iiif_print/child_indexer.rb
+++ b/app/indexers/concerns/iiif_print/child_indexer.rb
@@ -13,7 +13,8 @@ def self.decorate_work_types!
       #
 
       Hyrax.config.curation_concerns.each do |work_type|
-        next unless work_type.respond_to?(:iiif_print_config)
+        next unless work_type.respond_to?(:iiif_print_config?)
+        next unless work_type.iiif_print_config?
 
         work_type.send(:include, IiifPrint::SetChildFlag) unless work_type.included_modules.include?(IiifPrint::SetChildFlag)
         indexer = work_type.indexer
diff --git a/lib/iiif_print.rb b/lib/iiif_print.rb
index 9d209384..8eabfd56 100644
--- a/lib/iiif_print.rb
+++ b/lib/iiif_print.rb
@@ -131,8 +131,8 @@ def self.model_configuration(**kwargs)
     Module.new do
       extend ActiveSupport::Concern
 
-      included do
-        class_attribute :iiif_print_config, default: true
+      class_method do
+        def iiif_print_config?; true; end
       end
 
       # We don't know what you may want in your configuration, but from this gems implementation,
@@ -144,6 +144,8 @@ def self.model_configuration(**kwargs)
       define_method(:iiif_print_config) do
         @iiif_print_config ||= ModelConfig.new(**kwargs)
       end
+
+      def iiif_print_config?; true; end
     end
   end