diff --git a/internal/util/indexparamcheck/conf_adapter.go b/internal/util/indexparamcheck/conf_adapter.go
index 773a45fd56..7ec7417fe1 100644
--- a/internal/util/indexparamcheck/conf_adapter.go
+++ b/internal/util/indexparamcheck/conf_adapter.go
@@ -157,6 +157,7 @@ func newIVFConfAdapter() *IVFConfAdapter {
 	return &IVFConfAdapter{}
 }
 
+// IVFPQConfAdapter checks if a IVF_PQ index can be built.
 type IVFPQConfAdapter struct {
 	IVFConfAdapter
 }