diff --git a/pySerialTransfer/pySerialTransfer.py b/pySerialTransfer/pySerialTransfer.py
index c020b5c..068361a 100644
--- a/pySerialTransfer/pySerialTransfer.py
+++ b/pySerialTransfer/pySerialTransfer.py
@@ -149,8 +149,8 @@ def __init__(self, port, baud=115200, restrict_ports=True, debug=True, byte_form
         :return: void
         '''
 
-        self.txBuff = [' ' for i in range(MAX_PACKET_SIZE - 1)]
-        self.rxBuff = [' ' for i in range(MAX_PACKET_SIZE - 1)]
+        self.txBuff = [' ' for i in range(MAX_PACKET_SIZE)]
+        self.rxBuff = [' ' for i in range(MAX_PACKET_SIZE)]
 
         self.debug        = debug
         self.idByte       = 0