diff --git a/pym/update/update.py b/pym/update/update.py
index eeed960..6270a4a 100644
--- a/pym/update/update.py
+++ b/pym/update/update.py
@@ -2046,6 +2046,7 @@ class Update(MethodsInterface):
         ps.paths = ['/var/lib/portage/world']
         new_world_state_hash = ps.get_state()
         ini.setVar('system', {'world_hash': new_world_state_hash})
+        return True
 
     def drop_world_state_hash(self):
         """