diff --git a/internal/proxy/validate_util.go b/internal/proxy/validate_util.go
index 4ebe471c2c..052697a76b 100644
--- a/internal/proxy/validate_util.go
+++ b/internal/proxy/validate_util.go
@@ -348,6 +348,7 @@ func validateSchema(coll *schemapb.CollectionSchema) error {
 	return nil
 }
 
+// validateMultipleVectorFields check if schema has multiple vector fields.
 func validateMultipleVectorFields(schema *schemapb.CollectionSchema) error {
 	vecExist := false
 	var vecName string