diff --git a/library/server/wsf/src/response/wsf_not_implemented_response.e b/library/server/wsf/src/response/wsf_not_implemented_response.e
index 297dafc3..d97388d1 100644
--- a/library/server/wsf/src/response/wsf_not_implemented_response.e
+++ b/library/server/wsf/src/response/wsf_not_implemented_response.e
@@ -54,7 +54,8 @@ feature {WSF_RESPONSE} -- Output
 			h := header
 			res.set_status_code ({HTTP_STATUS_CODE}.not_implemented)
 
-			s := "Error 501 Not Implemented !"
+			s := "Error 501 Not Implemented ! "
+			s.append (request.request_uri)
 			if attached body as b then
 				s.append ("%N")
 				s.append (b)