diff --git a/plugins/provider/mm/calls-mm-origin.c b/plugins/provider/mm/calls-mm-origin.c
index 3afa189..5433195 100644
--- a/plugins/provider/mm/calls-mm-origin.c
+++ b/plugins/provider/mm/calls-mm-origin.c
@@ -820,6 +820,7 @@ dispose (GObject *object)
   CallsMMOrigin *self = CALLS_MM_ORIGIN (object);
 
   remove_calls (self, NULL);
+  g_clear_object (&self->voice);
   g_clear_object (&self->mm_obj);
   g_clear_object (&self->ussd);
   g_clear_object (&self->sim);