diff --git a/internal/querynode/load_index_info.go b/internal/querynode/load_index_info.go
index 6631b620b3..8bdf896cd1 100644
--- a/internal/querynode/load_index_info.go
+++ b/internal/querynode/load_index_info.go
@@ -30,6 +30,7 @@ import (
 	"github.com/milvus-io/milvus/internal/log"
 )
 
+// LoadIndexInfo is a wrapper of the underlying C-structure C.CLoadIndexInfo
 type LoadIndexInfo struct {
 	cLoadIndexInfo C.CLoadIndexInfo
 }