diff --git a/tiramisu/option/leadership.py b/tiramisu/option/leadership.py
index baddcc2..c36824f 100644
--- a/tiramisu/option/leadership.py
+++ b/tiramisu/option/leadership.py
@@ -69,11 +69,21 @@ class Leadership(OptionDescription):
                                                   child.impl_get_display_name()))
                 if idx != 0:
                     default = child.impl_getdefault()
-                    if default != [] and not isinstance(default, Calculation):
-                        raise ValueError(_('not allowed default value for follower option "{0}" '
-                                           'in leadership "{1}"'
-                                           '').format(child.impl_get_display_name(),
-                                                      self.impl_get_display_name()))
+                    if default != []:
+                        if child.impl_is_submulti() and isinstance(default, tuple):
+                            for val in default:
+                                if not isinstance(val, Calculation):
+                                    calculation = False
+                            else:
+                                # empty default is valid
+                                calculation = True
+                        else:
+                            calculation = isinstance(default, Calculation)
+                        if not calculation:
+                            raise ValueError(_('not allowed default value for follower option "{0}" '
+                                               'in leadership "{1}"'
+                                               '').format(child.impl_get_display_name(),
+                                                          self.impl_get_display_name()))
             if idx != 0:
                 # remove empty property for follower
                 child._properties = frozenset(child._properties - {'empty', 'unique'})