diff --git a/bitkey_proto/mapping.py b/bitkey_proto/mapping.py
index bf6eee87c0..de225b5be7 100644
--- a/bitkey_proto/mapping.py
+++ b/bitkey_proto/mapping.py
@@ -22,6 +22,10 @@ map_type_to_class = {
        18: proto.PinRequest,
        19: proto.PinAck,
        20: proto.PinCancel,
+       21: proto.SignInput,
+       22: proto.SignedInput,
+       23: proto.TxInput,
+       24: proto.TxOutput,
 }
 
 map_class_to_type = {}