diff --git a/tests/test_dyn_optiondescription.py b/tests/test_dyn_optiondescription.py
index 431e7d0..ef87667 100644
--- a/tests/test_dyn_optiondescription.py
+++ b/tests/test_dyn_optiondescription.py
@@ -1834,3 +1834,18 @@ async def test_dyn_leadership_requires():
                                                         {'leaderval1.ip_admin_eth0val1.ip_admin_eth0val1': '192.168.1.1'}],
      'leaderval2.ip_admin_eth0val2.ip_admin_eth0val2': []}
     assert not await list_sessions()
+
+
+@pytest.mark.asyncio
+async def test_dyn_leadership_mandatory():
+    nsd_zones_all = StrOption(name="nsd_zones_all", doc="nsd_zones_all", multi=True, default=['val1', 'val2'])
+    is_auto = BoolOption(name="is_auto_", doc="is auto")
+#    hostname = DomainnameOption(name="hostname_", multi=True, type='hostname', properties=frozenset({Calculation(func.calc_value, Params(ParamValue('frozen'), kwargs={'condition': ParamOption(is_auto, todict=True, notraisepropertyerror=True), 'expected': ParamValue(True)})), Calculation(func.calc_value, Params(ParamValue('force_default_on_freeze'), kwargs={'condition': ParamOption(is_auto, todict=True, notraisepropertyerror=True), 'expected': ParamValue(True)}))}))
+    hostname = DomainnameOption(name="hostname_", doc="hostname_", multi=True, type='hostname')
+    choice = ChoiceOption(name="type_", doc="type_", values=('A', 'CNAME'), multi=True, default_multi="A")
+    leadership = Leadership(name="hostname_", doc="hostname_", children=[hostname, choice], properties=frozenset({Calculation(calc_value, Params(ParamValue('hidden'), kwargs={'condition': ParamOption(is_auto, todict=True, notraisepropertyerror=True), 'expected': ParamValue(True)}))}))
+    dyn = DynOptionDescription(name="nsd_zone_", doc="Zone ", suffixes=Calculation(calc_value, Params((ParamOption(nsd_zones_all, notraisepropertyerror=True)))), children=[is_auto, leadership], properties=frozenset({"normal"}))
+    od = OptionDescription(name="nsd", doc="nsd", children=[nsd_zones_all, dyn])
+    async with await Config(od) as cfg:
+        await cfg.value.mandatory()
+    assert not await list_sessions()
diff --git a/tiramisu/option/optiondescription.py b/tiramisu/option/optiondescription.py
index 3520a52..99f2ece 100644
--- a/tiramisu/option/optiondescription.py
+++ b/tiramisu/option/optiondescription.py
@@ -329,3 +329,6 @@ class OptionDescription(OptionDescriptionWalk):
                                        rootpath,
                                        suffix,
                                        ori_dyn)
+
+    def impl_is_dynsymlinkoption(self) -> bool:
+        return False
diff --git a/tiramisu/option/syndynoptiondescription.py b/tiramisu/option/syndynoptiondescription.py
index 6df1cf5..4a4180e 100644
--- a/tiramisu/option/syndynoptiondescription.py
+++ b/tiramisu/option/syndynoptiondescription.py
@@ -30,20 +30,20 @@ from .syndynoption import SynDynOption
 
 class SynDynOptionDescription:
     __slots__ = ('_opt',
-                 '_subpath',
+                 'rootpath',
                  '_suffix',
                  'ori_dyn')
 
     def __init__(self,
                  opt: BaseOption,
-                 subpath: str,
+                 rootpath: str,
                  suffix: str,
                  ori_dyn) -> None:
         self._opt = opt
-        if subpath is None:
-            subpath = ''
-        assert isinstance(subpath, str), 'subpath must be a string, not {}'.format(type(subpath))
-        self._subpath = subpath
+        if rootpath is None:
+            rootpath = ''
+        assert isinstance(rootpath, str), 'rootpath must be a string, not {}'.format(type(rootpath))
+        self.rootpath = rootpath
         self._suffix = suffix
         # For a Leadership inside a DynOptionDescription
         self.ori_dyn = ori_dyn
@@ -94,6 +94,9 @@ class SynDynOptionDescription:
                                                self._opt))
         return children
 
+    def impl_is_dynsymlinkoption(self) -> bool:
+        return True
+
     async def get_children_recursively(self,
                                        bytype: Optional[BaseOption],
                                        byname: Optional[str],
@@ -106,10 +109,10 @@ class SynDynOptionDescription:
             yield option
 
     def impl_getpath(self) -> str:
-        subpath = self._subpath
-        if subpath != '':
-            subpath += '.'
-        return subpath + self.impl_getname()
+        rootpath = self.rootpath
+        if rootpath != '':
+            rootpath += '.'
+        return rootpath + self.impl_getname()
 
     def impl_get_display_name(self) -> str:
         return self._opt.impl_get_display_name() + self._suffix
@@ -157,3 +160,6 @@ class SynDynLeadership(SynDynOptionDescription):
                                                    option_bag,
                                                    owner,
                                                    dyn=self)
+
+    def impl_getsuffix(self) -> str:
+        return self._suffix