diff --git a/src/ray/gcs/gcs_server/gcs_server_main.cc b/src/ray/gcs/gcs_server/gcs_server_main.cc
index 05af753b7..85c3ef743 100644
--- a/src/ray/gcs/gcs_server/gcs_server_main.cc
+++ b/src/ray/gcs/gcs_server/gcs_server_main.cc
@@ -22,7 +22,7 @@
 
 DEFINE_string(redis_address, "", "The ip address of redis.");
 DEFINE_int32(redis_port, -1, "The port of redis.");
-DEFINE_int32(gcs_server_port, -1, "The port of gcs server.");
+DEFINE_int32(gcs_server_port, 0, "The port of gcs server.");
 DEFINE_int32(metrics_agent_port, -1, "The port of metrics agent.");
 DEFINE_string(config_list, "", "The config list of raylet.");
 DEFINE_string(redis_password, "", "The password of redis.");