diff --git a/internal/proxy/validate_util.go b/internal/proxy/validate_util.go
index 10ce58f010..e904243dab 100644
--- a/internal/proxy/validate_util.go
+++ b/internal/proxy/validate_util.go
@@ -26,6 +26,7 @@ import (
 	"github.com/milvus-io/milvus/internal/proto/schemapb"
 )
 
+// enableMultipleVectorFields indicates whether to enable multiple vector fields.
 const enableMultipleVectorFields = false
 
 func isAlpha(c uint8) bool {