diff --git a/python/src/trezorlib/transport/hid.py b/python/src/trezorlib/transport/hid.py
index aab512b2f..97865f3e5 100644
--- a/python/src/trezorlib/transport/hid.py
+++ b/python/src/trezorlib/transport/hid.py
@@ -90,7 +90,8 @@ class HidHandle:
 
     def read_chunk(self) -> bytes:
         while True:
-            chunk = self.handle.read(64)
+            # hidapi seems to return lists of ints instead of bytes
+            chunk = bytes(self.handle.read(64))
             if chunk:
                 break
             else: