diff --git a/selfdrive/controls/lib/sunnypilot/custom_stock_longitudinal_controller/controllers.py b/selfdrive/controls/lib/sunnypilot/custom_stock_longitudinal_controller/controllers.py
index 26db661e47..29654fd374 100644
--- a/selfdrive/controls/lib/sunnypilot/custom_stock_longitudinal_controller/controllers.py
+++ b/selfdrive/controls/lib/sunnypilot/custom_stock_longitudinal_controller/controllers.py
@@ -29,7 +29,6 @@ class CustomStockLongitudinalControllerBase(ABC):
     self.v_set_dis = 0
     self.v_cruise_min = 0
     self.button_state = ButtonControlState.inactive
-    self.button_select = 0
     self.slc_active_stock = False
     self.sl_force_active_timer = 0
     self.v_tsc_state = 0