diff --git a/test/test_config.py b/test/test_config.py
index 5e96366..df3b84d 100644
--- a/test/test_config.py
+++ b/test/test_config.py
@@ -173,3 +173,17 @@ def test_get_modified_values():
     assert config.cfgimpl_get_values().get_modified_values() == {'od.g5': ('user', 'yes')}
     config.od.g4 = True
     assert config.cfgimpl_get_values().get_modified_values() == {'od.g5': ('user', 'yes'), 'od.g4': ('user', True)}
+
+
+def test_has_value():
+    g1 = IntOption('g1', '', 1)
+    g2 = StrOption('g2', '', 'héhé')
+    g3 = UnicodeOption('g3', '', u'héhé')
+    g4 = BoolOption('g4', '', True)
+    g5 = StrOption('g5', '')
+    d1 = OptionDescription('od', '', [g1, g2, g3, g4, g5])
+    root = OptionDescription('root', '', [d1])
+    config = Config(root)
+    assert not g5 in config.cfgimpl_get_values()
+    config.od.g5 = 'yes'
+    assert g5 in config.cfgimpl_get_values()
diff --git a/tiramisu/value.py b/tiramisu/value.py
index a5827bc..9535869 100644
--- a/tiramisu/value.py
+++ b/tiramisu/value.py
@@ -92,10 +92,10 @@ class Values(object):
         :param opt: the `option.Option()` object
         """
         path = self._get_opt_path(opt)
-        self._contains(path)
+        return self._contains(path)
 
     def _contains(self, path):
-        return self._p_.hasvalue('value', path)
+        return self._p_.hasvalue(path)
 
     def __delitem__(self, opt):
         """overrides the builtins `del()` instructions"""