diff --git a/lib/issues_show_hook_listener.rb b/lib/issues_show_hook_listener.rb
index beba85f..b734a73 100644
--- a/lib/issues_show_hook_listener.rb
+++ b/lib/issues_show_hook_listener.rb
@@ -41,7 +41,7 @@ class IssuesShowHookListener < Redmine::Hook::ViewListener
     end
     
     
-    if issue.vehicle
+    if issue.vehicles_id
       vehicle = link_to issue.vehicle.to_s, "#{Redmine::Utils::relative_url_root}/vehicles/#{issue.vehicle.id}"
       vin = issue.vehicle.vin 
       notes = issue.vehicle.notes