diff --git a/docker/.env.example b/docker/.env.example
index 102aba3e8d..0ed510f598 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -406,6 +406,7 @@ QDRANT_GRPC_PORT=6334
 # Milvus configuration. Only available when VECTOR_STORE is `milvus`.
 # The milvus uri.
 MILVUS_URI=http://host.docker.internal:19530
+MILVUS_DATABASE=
 MILVUS_TOKEN=
 MILVUS_USER=
 MILVUS_PASSWORD=