diff --git a/plugins/redmine_code_review/app/views/code_review/_issues_show_details_bottom.html.erb b/plugins/redmine_code_review/app/views/code_review/_issues_show_details_bottom.html.erb
index e60198fff..480119ca7 100644
--- a/plugins/redmine_code_review/app/views/code_review/_issues_show_details_bottom.html.erb
+++ b/plugins/redmine_code_review/app/views/code_review/_issues_show_details_bottom.html.erb
@@ -46,8 +46,8 @@ review = issue.code_review
       %>
         <%= l(:label_revision) + " "%>
       <%=  link_to_revision(assignment.revision, repo) %>
-      <% elsif assignment.attachment %>
-        <%= link_to(assignment.attachment.filename, :controller => 'attachments', :action => 'show', :id => attachment.id) %>
+      <% elsif assignment.respond_to?("attachment") && assignment.attachment %>
+        <%= link_to(assignment.attachment.filename.to_s, :controller => 'attachments', :action => 'show', :id => assignment.attachment.id) %>
       <% end %>
     </td>
   </tr>