diff --git a/internal/querynode/segment.go b/internal/querynode/segment.go
index 7036b8c398..979c82964d 100644
--- a/internal/querynode/segment.go
+++ b/internal/querynode/segment.go
@@ -56,6 +56,7 @@ const (
 	maxBloomFalsePositive float64 = 0.005
 )
 
+// VectorFieldInfo contains binlog info of vector field
 type VectorFieldInfo struct {
 	fieldBinlog *datapb.FieldBinlog
 }