diff --git a/lib/dor-services.rb b/lib/dor-services.rb
index 65afa0bc..21d85cb8 100644
--- a/lib/dor-services.rb
+++ b/lib/dor-services.rb
@@ -155,4 +155,6 @@ module Workflow
   end
 
   eager_load!
+
+  require 'dor/utils/hydrus_shims'
 end
diff --git a/lib/dor/utils/hydrus_shims.rb b/lib/dor/utils/hydrus_shims.rb
new file mode 100644
index 00000000..9b3a3911
--- /dev/null
+++ b/lib/dor/utils/hydrus_shims.rb
@@ -0,0 +1,11 @@
+module Hydrus
+  # These shims allow DOR to interact seamlessly with Hydrus' custom models
+  class Item < Dor::Item
+  end
+
+  class Collection < Dor::Collection
+  end
+
+  class AdminPolicyObject < Dor::AdminPolicyObject
+  end
+end