diff --git a/sms_registration.py b/sms_registration.py
index c11f7c9..929dcdd 100644
--- a/sms_registration.py
+++ b/sms_registration.py
@@ -11,8 +11,10 @@ PHONE_IP = "192.168.5.120"
 API_PORT = 8080
 GATEWAY = "22223333"
 
-def register(push_token: bytes, no_parse = False, gateway = GATEWAY) -> tuple[str, bytes]:
+def register(push_token: bytes, no_parse = False, gateway = None) -> tuple[str, bytes]:
     """Forwards a registration request to the phone and returns the phone number, signature for the provided push token"""
+    if gateway is None:
+        gateway = GATEWAY
     token = push_token.hex().upper()
     req_id = random.randint(0, 2**32)
     sms = f"REG-REQ?v=3;t={token};r={req_id};"