diff --git a/source/brailleDisplayDrivers/brailliantB.py b/source/brailleDisplayDrivers/brailliantB.py
index 3a3a9ffad7b..fbf42f2b28b 100644
--- a/source/brailleDisplayDrivers/brailliantB.py
+++ b/source/brailleDisplayDrivers/brailliantB.py
@@ -196,7 +196,8 @@ def _serHandleResponse(self, msgId: bytes, payload: bytes):
 			log.debugWarning("Unknown message: id {id!r}, payload {payload!r}".format(id=msgId, payload=payload))
 
 	def _hidOnReceive(self, data: bytes):
-		rId = data[0]
+		# Indexing bytes gives an int, where slicing gives a byte, so 0:1 will return a bytes of length 1
+		rId: bytes = data[0:1]
 		if rId == HR_KEYS:
 			keys = data[1:].split(b"\x00", 1)[0]
 			keys = {keyInt for keyInt in keys}
diff --git a/source/brailleDisplayDrivers/freedomScientific.py b/source/brailleDisplayDrivers/freedomScientific.py
index 04036c34d7a..cf53d392c79 100755
--- a/source/brailleDisplayDrivers/freedomScientific.py
+++ b/source/brailleDisplayDrivers/freedomScientific.py
@@ -208,7 +208,6 @@ def __init__(self, port="auto"):
 						epIn=1,
 						epOut=0,
 						onReceive=self._onReceive,
-						writeSize=0,
 						onReceiveSize=56
 					)
 				else: