diff --git a/os/file.go b/os/file.go
index 1b8436e..32638da 100644
--- a/os/file.go
+++ b/os/file.go
@@ -50,7 +50,7 @@ func ConvertFileHandleToReader(obj interface{}) (data io.Reader, err error) {
 		return obj.(io.Reader), nil
 
 	default:
-		return nil, errors.New("not support file data")
+		return nil, errors.New("not support file handle data")
 	}
 
 }