diff --git a/app/subsystems/content/models/page.rb b/app/subsystems/content/models/page.rb
index 9e33dda937..0e6817dc3f 100644
--- a/app/subsystems/content/models/page.rb
+++ b/app/subsystems/content/models/page.rb
@@ -224,3 +224,8 @@ def fragment_splitter
     )
   end
 end
+
+# Compatibility: Many existing pages have serialized fragments saved as OpenStax::Cnx::V1::Fragment
+module OpenStax::Cnx
+  V1 = ::OpenStax::Content
+end