diff --git a/src/common/backend/utils/misc/guc.cpp b/src/common/backend/utils/misc/guc.cpp
index 2f243d6fe..6ded1a2a3 100644
--- a/src/common/backend/utils/misc/guc.cpp
+++ b/src/common/backend/utils/misc/guc.cpp
@@ -9238,7 +9238,7 @@ static void init_configure_names_int()
                 NULL
             },
             &u_sess->attr.attr_sql.max_parallel_workers_per_gather,
-            2,
+            0,
             0,
             MAX_PARALLEL_WORKER_LIMIT,
             NULL,