diff --git a/src/libcharon/sa/tasks/ike_auth.c b/src/libcharon/sa/tasks/ike_auth.c
index 32a311845..b440ec811 100644
--- a/src/libcharon/sa/tasks/ike_auth.c
+++ b/src/libcharon/sa/tasks/ike_auth.c
@@ -825,7 +825,7 @@ static status_t process_i(private_ike_auth_t *this, message_t *message)
 					break;
 				default:
 				{
-					if (type < 16383)
+					if (type <= 16383)
 					{
 						DBG1(DBG_IKE, "received %N notify error",
 							 notify_type_names, type);