diff --git a/include/sqlpp11/where.h b/include/sqlpp11/where.h
index a07b5298..01eb449e 100644
--- a/include/sqlpp11/where.h
+++ b/include/sqlpp11/where.h
@@ -230,7 +230,8 @@ namespace sqlpp
   using check_where_t = static_combined_check_t<
       static_check_t<logic::all_t<detail::is_expression_impl<Expressions>::type::value...>::value,
                      assert_where_expressions_t>,
-      static_check_t<logic::all_t<is_boolean_t<Expressions>::value...>::value, assert_where_boolean_t>,
+      static_check_t<logic::all_t<std::is_same<value_type_of<Expressions>, boolean>::value...>::value,
+                     assert_where_boolean_t>,
       static_check_t<logic::all_t<(not detail::contains_aggregate_function_impl<Expressions>::type::value)...>::value,
                      assert_where_no_aggregate_functions_t>>;