1 files changed, 2 insertions, 1 deletions

diff --git a/lib/basic_rp.cc b/lib/basic_rp.cc
index 8125aa7..9c7113b 100644
--- a/lib/basic_rp.cc
+++ b/lib/basic_rp.cc
@@ -218,7 +218,8 @@ namespace opkele {
     void basic_RP::id_res(const basic_openid_message& om,extension_t *ext) {
         reset_vars();
         bool o2 = om.has_field("ns")
-            && om.get_field("ns")==OIURI_OPENID20 && !om.get_field("op_endpoint").empty();
+            && om.get_field("ns")==OIURI_OPENID20
+            && om.has_field("op_endpoint") && !om.get_field("op_endpoint").empty();
         if( (!o2) && om.has_field("user_setup_url"))
             throw id_res_setup(OPKELE_CP_ "assertion failed, setup url provided",
                     om.get_field("user_setup_url"));