diff --git a/app/lib/active_storage/file_not_found_error.rb b/app/lib/active_storage/file_not_found_error.rb
new file mode 100644
index 000000000..580d30666
--- /dev/null
+++ b/app/lib/active_storage/file_not_found_error.rb
@@ -0,0 +1,4 @@
+module ActiveStorage
+  # activestorage-openstack uses ActiveStorage::FileNotFoundError which only exists in rails 6
+  class FileNotFoundError < StandardError; end
+end