diff --git a/protob/messages.proto b/protob/messages.proto
index 8bfc06e59e..8a4b64b379 100644
--- a/protob/messages.proto
+++ b/protob/messages.proto
@@ -142,7 +142,7 @@ message ButtonAck {
 //
 // Response: PinMatrixAck, Cancel
 message PinMatrixRequest {
-	optional string message = 1;	// Human readable message
+	optional PinMatrixRequestType type = 1;
 }
 
 // Message is sent by the computer as a response to PinMatrixRequest previously sent by the device.
diff --git a/protob/types.proto b/protob/types.proto
index bce837c9ef..7739e9319a 100644
--- a/protob/types.proto
+++ b/protob/types.proto
@@ -57,6 +57,12 @@ enum ButtonRequestType {
 	ButtonRequest_SignTx = 8;
 }
 
+enum PinMatrixRequestType {
+	PinMatrixRequestType_Current = 1;
+	PinMatrixRequestType_NewFirst = 2;
+	PinMatrixRequestType_NewSecond = 3;
+}
+
 // Structure of BIP32 (hierarchical deterministic) node
 // Used for imports of private key into the device and exporting public key out of device
 message HDNodeType {