diff --git a/src/config/schema-transformer/to_bgp.py b/src/config/schema-transformer/to_bgp.py
index 0238c9dbaa9..65000769b15 100644
--- a/src/config/schema-transformer/to_bgp.py
+++ b/src/config/schema-transformer/to_bgp.py
@@ -505,7 +505,7 @@ def _bool(s):
                         help="Start port for bgp-as-a-service proxy")
     parser.add_argument("--bgpaas_port_end", type=int,
                         help="End port for bgp-as-a-service proxy")
-    parser.add_argument("--zk_timeout",
+    parser.add_argument("--zk_timeout", type=int,
                         help="Timeout for ZookeeperClient")
     parser.add_argument("--logical_routers_enabled", type=_bool,
                         help="Enabled logical routers")