diff --git a/src/sdam/topology.ts b/src/sdam/topology.ts
index dc1514fb0d..d1911b4c93 100644
--- a/src/sdam/topology.ts
+++ b/src/sdam/topology.ts
@@ -148,6 +148,7 @@ export interface TopologyOptions extends BSONSerializeOptions, ServerOptions {
   metadata: ClientMetadata;
   /** MongoDB server API version */
   serverApi?: ServerApi;
+  /** @internal */
   [featureFlag: symbol]: any;
 }