diff --git a/protob/messages-cardano.proto b/protob/messages-cardano.proto
index 8aa2d0b891..42b0e19f5c 100644
--- a/protob/messages-cardano.proto
+++ b/protob/messages-cardano.proto
@@ -82,7 +82,7 @@ message CardanoVerifyMessage {
 /**
  * Request: Ask device to sign Cardano transaction
  * @start
- * @next CardanoSignedTransaction
+ * @next CardanoSignedTx
  * @next CardanoTxRequest
  * @next Failure
  */
@@ -122,7 +122,7 @@ message CardanoTxRequest {
 
 /**
  * Request: Reported transaction data
- * @next CardanoSignedTransaction
+ * @next CardanoSignedTx
  * @next CardanoTxRequest
  */
 message CardanoTxAck {
@@ -133,7 +133,7 @@ message CardanoTxAck {
  * Response: Serialised signed cardano transaction
  * @end
  */
-message CardanoSignedTransaction {
+message CardanoSignedTx {
     optional bytes tx_hash = 1; // hash of the signed transaction
     optional bytes tx_body = 2; // serialised body of the signed transaction
 }
diff --git a/protob/messages.proto b/protob/messages.proto
index d93efb02c2..5edcaeefb6 100644
--- a/protob/messages.proto
+++ b/protob/messages.proto
@@ -172,7 +172,7 @@ enum MessageType {
     MessageType_CardanoGetAddress = 307 [(wire_in) = true];
     MessageType_CardanoAddress = 308 [(wire_out) = true];
     MessageType_CardanoTxAck = 309 [(wire_in) = true];
-    MessageType_CardanoSignedTransaction = 310 [(wire_out) = true];
+    MessageType_CardanoSignedTx = 310 [(wire_out) = true];
 
     // Ontology
     MessageType_OntologyGetAddress = 350 [(wire_in) = true];