diff --git a/UM/Settings/SettingFunction.py b/UM/Settings/SettingFunction.py
index fb0d998f8..194087a00 100644
--- a/UM/Settings/SettingFunction.py
+++ b/UM/Settings/SettingFunction.py
@@ -104,8 +104,7 @@ def __call__(self, value_provider: ContainerInterface, context: Optional[Propert
             local_variables[name] = value
 
         if additional_variables is not None:
-            for name, value in additional_variables.items():
-                local_variables[name] = value
+            local_variables |= additional_variables
 
         globals_variables: Dict[str, Any] = {}
         globals_variables.update(globals())