diff --git a/system/hardware/tici/pins.py b/system/hardware/tici/pins.py
index 082a402f15..5ac0158082 100644
--- a/system/hardware/tici/pins.py
+++ b/system/hardware/tici/pins.py
@@ -10,6 +10,7 @@ class GPIO:
   STM_RST_N = 124
   STM_BOOT0 = 134
 
+  SIREN = 42
   SOM_ST_IO = 49
 
   LTE_RST_N = 50