diff --git a/src/opt/opt_context.cpp b/src/opt/opt_context.cpp
index 1950a199d..69177e290 100644
--- a/src/opt/opt_context.cpp
+++ b/src/opt/opt_context.cpp
@@ -265,6 +265,9 @@ namespace opt {
         normalize();
         internalize();
         update_solver();
+        if (contains_quantifiers()) {
+            warning_msg("optimization with quantified constraints is not supported");
+        }
 #if 0
         if (is_qsat_opt()) {
             return run_qsat_opt();
@@ -368,7 +371,6 @@ namespace opt {
         if (result == l_true && committed) m_optsmt.commit_assignment(index);
         if (result == l_true && m_optsmt.is_unbounded(index, is_max) && contains_quantifiers()) {
             throw default_exception("unbounded objectives on quantified constraints is not supported");
-            result = l_undef;
         }
         return result;
     }