diff --git a/lib/paperclip/storage/delayed_upload.rb b/lib/paperclip/storage/delayed_upload.rb
index 0e8d257..304684f 100644
--- a/lib/paperclip/storage/delayed_upload.rb
+++ b/lib/paperclip/storage/delayed_upload.rb
@@ -34,7 +34,7 @@ module Paperclip
         raise if model.exists?(id)
       rescue Errno::ENOENT => e
         raise if model.exists?(id)
-        Rollbar.warn(e, file_name: e.message.split(' - ')[-1])
+        Rollbar.warn(e, file_name: e.message.split(' - ')[-1]) if defined?(Rollbar)
       end
     end
   end