diff --git a/zvt/src/constants.rs b/zvt/src/constants.rs
index 0833d6d..5401c55 100644
--- a/zvt/src/constants.rs
+++ b/zvt/src/constants.rs
@@ -5,6 +5,9 @@ use thiserror::Error;
 #[derive(Debug, PartialEq, FromPrimitive, Clone, Copy, Error)]
 #[repr(u8)]
 pub enum ErrorMessages {
+    #[cfg(feature = "with_lavego_error_codes")]
+    #[error("declined, referred voice authorization possible")]
+    Declined = 0x02,
     #[cfg(feature = "with_lavego_error_codes")]
     #[error("declined")]
     Declined = 0x05,