diff --git a/benchmark/v5.1-performance-benchmarking-with-tpch.md b/benchmark/v5.1-performance-benchmarking-with-tpch.md
index 52003973bc51d..39e6ccd6be727 100644
--- a/benchmark/v5.1-performance-benchmarking-with-tpch.md
+++ b/benchmark/v5.1-performance-benchmarking-with-tpch.md
@@ -50,7 +50,6 @@ Set session variables with the following SQL statements:
 ```sql
 set @@tidb_isolation_read_engines='tiflash';
 set @@tidb_allow_mpp=1;
-set @@tidb_opt_broadcast_join=0;
 set @@tidb_mem_quota_query = 10 << 30;
 ```