diff --git a/internal/util/indexparamcheck/conf_adapter.go b/internal/util/indexparamcheck/conf_adapter.go
index db1aabd1c7..ff00c6859c 100644
--- a/internal/util/indexparamcheck/conf_adapter.go
+++ b/internal/util/indexparamcheck/conf_adapter.go
@@ -265,6 +265,7 @@ func newBinIDMAPConfAdapter() *BinIDMAPConfAdapter {
 	return &BinIDMAPConfAdapter{}
 }
 
+// BinIVFConfAdapter checks if a bin IFV index can be built.
 type BinIVFConfAdapter struct {
 }