diff --git a/docker/.env.example b/docker/.env.example
index 37738a506..f461be5a4 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -478,7 +478,7 @@ ANALYTICDB_PORT=5432
 ANALYTICDB_MIN_CONNECTION=1
 ANALYTICDB_MAX_CONNECTION=5
 
-# TiDB vector configurations, only available when VECTOR_STORE is `tidb`
+# TiDB vector configurations, only available when VECTOR_STORE is `tidb_vector`
 TIDB_VECTOR_HOST=tidb
 TIDB_VECTOR_PORT=4000
 TIDB_VECTOR_USER=