diff --git a/lib/attachments_controller_patch.rb b/lib/attachments_controller_patch.rb
index 9e5e8ae..efd3a66 100644
--- a/lib/attachments_controller_patch.rb
+++ b/lib/attachments_controller_patch.rb
@@ -34,6 +34,14 @@ module AttachmentsControllerPatch
         end
       end
 
+      def disposition(attachment)
+        if attachment.is_pdf? || attachment.is_image?
+          'inline'
+        else
+          'attachment'
+        end
+      end
+
     end
   end
 end