2 files changed, 2 insertions, 2 deletions
diff --git a/bin/idp b/bin/idp
index 4df5015..fc276bb 100755
--- a/bin/idp
+++ b/bin/idp
@@ -286,7 +286,7 @@ class IdentityProvider
   end
 
   def not_found
-    [404, {}, []]
+    [404, { 'X-Backend-Server' => 'IDP' }, []]
   end
 
   def saml_params_from(request)
diff --git a/bin/sp b/bin/sp
index 1181236..8fe7472 100755
--- a/bin/sp
+++ b/bin/sp
@@ -81,7 +81,7 @@ class ServiceProvider
   private
 
   def not_found
-    [404, {}, []]
+    [404, { 'X-Backend-Server' => 'SP' }, []]
   end
 
   def redirect_to(location)