diff --git a/rust/src/rdp/rdp.rs b/rust/src/rdp/rdp.rs
index 976ff71b37..4a2c034dda 100644
--- a/rust/src/rdp/rdp.rs
+++ b/rust/src/rdp/rdp.rs
@@ -487,7 +487,7 @@ pub unsafe extern "C" fn rs_rdp_register_parser() {
         get_tx_iterator: None,
         get_tx_data: rs_rdp_get_tx_data,
         apply_tx_config: None,
-        flags: 0,
+        flags: APP_LAYER_PARSER_OPT_UNIDIR_TXS,
         truncate: None,
     };