diff --git a/p4app/controller.py b/p4app/controller.py
index 6cdb209..7300bb0 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -61,7 +61,7 @@ class L2Controller(object):
         self.info['v4_base'] = ipaddress.ip_network("10.0.0.0/8")
         self.info['v4_gen'] = self.info['v4_base'].subnets(new_prefix=self.info['v4_mask'])
 
-        self.info['switch_suffix'] = 42
+        self.info['switch_suffix'] = 0x42
 
         self.v6_routes = {}
         self.v6_routes[None] = []