diff --git a/tools/pb2py b/tools/pb2py
index 5188ec078c..587c8065a5 100755
--- a/tools/pb2py
+++ b/tools/pb2py
@@ -68,6 +68,7 @@ def process_message(descriptor, protobuf_module, msg_id, indexfile, is_upy):
 
         types = {
             field.TYPE_UINT64:  'p.UVarintType',
+            field.TYPE_INT64:   'p.UVarintType',
             field.TYPE_UINT32:  'p.UVarintType',
             field.TYPE_ENUM:    'p.UVarintType',
             field.TYPE_SINT32:  'p.Sint32Type',