diff --git a/bitkeylib/mapping.py b/bitkeylib/mapping.py
index 19969b3cf..668bfdb1b 100644
--- a/bitkeylib/mapping.py
+++ b/bitkeylib/mapping.py
@@ -1,64 +1,67 @@
-import bitkey_pb2 as proto
+import trezor_pb2 as proto
 
 map_type_to_class = {
-       0: proto.Initialize,
-       1: proto.Ping,
-       2: proto.Success,
-       3: proto.Failure,
-       4: proto.GetUUID,
-       5: proto.UUID,
-       6: proto.OtpRequest,
-       7: proto.OtpAck,
-       8: proto.OtpCancel,
-       9: proto.GetEntropy,
-       10: proto.Entropy,
-       11: proto.GetMasterPublicKey,
-       12: proto.MasterPublicKey,
-       13: proto.LoadDevice,
-       14: proto.ResetDevice,
-       15: proto.SignTx,
-#       16: proto.SignedTx,
-       17: proto.Features,
-       18: proto.PinRequest,
-       19: proto.PinAck,
-       20: proto.PinCancel,
-       21: proto.TxRequest,
-       #22: proto.OutputRequest,
-       23: proto.TxInput,
-       24: proto.TxOutput,
-       25: proto.SetMaxFeeKb,
-       26: proto.ButtonRequest,
-       27: proto.ButtonAck,
-       28: proto.ButtonCancel,
-       29: proto.GetAddress,
-       30: proto.Address,
-       100: proto.DebugLinkDecision,
-       101: proto.DebugLinkGetState,
-       102: proto.DebugLinkState,
+    0: proto.Initialize,
+    1: proto.Ping,
+    2: proto.Success,
+    3: proto.Failure,
+    4: proto.GetUUID,
+    5: proto.UUID,
+    9: proto.GetEntropy,
+    10: proto.Entropy,
+    11: proto.GetMasterPublicKey,
+    12: proto.MasterPublicKey,
+    13: proto.LoadDevice,
+    14: proto.ResetDevice,
+    15: proto.SignTx,
+    # 16: proto.SignedTx,
+    17: proto.Features,
+    18: proto.PinMatrixRequest,
+    19: proto.PinMatrixAck,
+    20: proto.PinMatrixCancel,
+    21: proto.TxRequest,
+    # 22: proto.OutputRequest,
+    23: proto.TxInput,
+    24: proto.TxOutput,
+    25: proto.SetMaxFeeKb,
+    26: proto.ButtonRequest,
+    27: proto.ButtonAck,
+    28: proto.ButtonCancel,
+    29: proto.GetAddress,
+    30: proto.Address,
+    100: proto.DebugLinkDecision,
+    101: proto.DebugLinkGetState,
+    102: proto.DebugLinkState,
+    103: proto.DebugLinkStop,
 }
 
 map_class_to_type = {}
 
+
 def get_type(msg):
     return map_class_to_type[msg.__class__]
 
+
 def get_class(t):
     return map_type_to_class[t]
 
+
 def build_index():
     for k, v in map_type_to_class.items():
         map_class_to_type[v] = k
-            
+
+
 def check_missing():
     from google.protobuf import reflection
-    
-    types = [ proto.__dict__[item] for item in dir(proto)
-                if issubclass(proto.__dict__[item].__class__, reflection.GeneratedProtocolMessageType) ]
-    
+
+    types = [proto.__dict__[item] for item in dir(proto)
+             if issubclass(proto.__dict__[item].__class__, reflection.GeneratedProtocolMessageType)]
+
     missing = list(set(types) - set(map_type_to_class.values()))
 
     if len(missing):
         raise Exception("Following protobuf messages are not defined in mapping: %s" % missing)
 
+
 check_missing()
 build_index()