diff --git a/robot_class.py b/robot_class.py
index f7da00b..b0be63b 100644
--- a/robot_class.py
+++ b/robot_class.py
@@ -112,6 +112,8 @@ class LazyRobot:
     left: "Motor"
     right: "Motor"
     db: "DriveBase"
+    extra_L: "Motor"
+    extra_E: "Motor"
 
     # stato interno del proxy
     _params: "dict[str, object]"
diff --git a/run_02.py b/run_02.py
index 279ae0a..1c43c60 100644
--- a/run_02.py
+++ b/run_02.py
@@ -11,8 +11,8 @@ def main(robot: LazyRobot):
     hub = robot.hub
     db = robot.db
 
-    msu_R = robot.extra_R
-    msu_L = robot.extra_L
+    msu_R: Motor = robot.extra_R
+    msu_L: Motor = robot.extra_L
 
     db.settings(864, 300, 100, 50)