diff --git a/rocketpy/rocket/rocket.py b/rocketpy/rocket/rocket.py
index fc5aba482..61de81f27 100644
--- a/rocketpy/rocket/rocket.py
+++ b/rocketpy/rocket/rocket.py
@@ -976,6 +976,7 @@ def __add_single_surface(self, surface, position):
             else Vector(position)
         )
         if isinstance(surface, RailButtons):
+            self.rail_buttons = Components()
             self.rail_buttons.add(surface, position)
         else:
             self.aerodynamic_surfaces.add(surface, position)