diff --git a/.env.example b/.env.example
index 5a5f6429..849b94ad 100644
--- a/.env.example
+++ b/.env.example
@@ -66,6 +66,10 @@ EMBEDDING_MODEL=
 # OPTIONAL url for openrag link to langflow in the UI
 LANGFLOW_PUBLIC_URL=
 
+# OPTIONAL: Override the full docling-serve URL (e.g., for remote instances)
+# If not set, auto-detects host and uses port 5001
+# DOCLING_SERVE_URL=http://my-docling-server:5001
+
 # OPTIONAL: Override host for docling service (for special networking setups)
 # HOST_DOCKER_INTERNAL=host.containers.internal