diff --git a/lib/rs/src/protocol/mod.rs b/lib/rs/src/protocol/mod.rs
index f693375..019f717 100644
--- a/lib/rs/src/protocol/mod.rs
+++ b/lib/rs/src/protocol/mod.rs
@@ -920,7 +920,7 @@
     field_ident.id.ok_or_else(|| {
         crate::Error::Protocol(crate::ProtocolError {
             kind: crate::ProtocolErrorKind::Unknown,
-            message: format!("missing field in in {:?}", field_ident),
+            message: format!("missing field id in {:?}", field_ident),
         })
     })
 }