diff --git a/Utils.py b/Utils.py
index 84d3a33dc7..5697bb162a 100644
--- a/Utils.py
+++ b/Utils.py
@@ -442,6 +442,7 @@ class RestrictedUnpickler(pickle.Unpickler):
         if module == "builtins" and name in safe_builtins:
             return getattr(builtins, name)
         # used by OptionCounter
+        # necessary because the actual Options class instances are pickled when transfered to WebHost generation pool
         if module == "collections" and name == "Counter":
             return collections.Counter
         # used by MultiServer -> savegame/multidata