diff --git a/candle/candle_bus.py b/candle/candle_bus.py
index 26d0797..801a0a5 100644
--- a/candle/candle_bus.py
+++ b/candle/candle_bus.py
@@ -182,9 +182,8 @@ def _recv_internal(self, timeout: Optional[float]) -> Tuple[Optional[can.Message
             if frame is not None:
                 return convert_frame(i, frame, self._hardware_timestamps[i]), False
 
-        # Do not block if timeout is None.
         if timeout is None:
-            return None, False
+            timeout = 2**32 - 1
 
         # Block until a frame is available.
         if not self._device.wait_for_frame(timeout):