diff --git a/eive_tmtc/tmtc/acs/acs_ctrl.py b/eive_tmtc/tmtc/acs/acs_ctrl.py
index c99e669..92a1843 100644
--- a/eive_tmtc/tmtc/acs/acs_ctrl.py
+++ b/eive_tmtc/tmtc/acs/acs_ctrl.py
@@ -40,6 +40,7 @@ class SetId(enum.IntEnum):
 
 
 class Submode(enum.IntEnum):
+    OFF = 0
     SAFE = 10
     DETUMBLE = 11
     IDLE = 12