diff --git a/node/src/index.ts b/node/src/index.ts
index 1f150f56..4721a53e 100644
--- a/node/src/index.ts
+++ b/node/src/index.ts
@@ -289,7 +289,9 @@ export class LocalTable<T = number[]> implements Table<T> {
   }
 }
 
-interface IvfPQIndexConfig {
+/// Config to build IVF_PQ index.
+///
+export interface IvfPQIndexConfig {
   /**
    * The column to be indexed
    */