diff --git a/buttonreader.py b/buttonreader.py
index f93a963..564675b 100644
--- a/buttonreader.py
+++ b/buttonreader.py
@@ -47,9 +47,6 @@ class BaseInput(QtCore.QThread):
 		#print("player %d can answer now" % playerNo)
 		pass
 
-class SerialThread(QtCore.QThread):
-	dataReady = QtCore.Signal(str)
-
 class SerialInput(BaseInput):
 	def __init__(self, app, device, baudrate=9600, bytesize=8, parity='N', stopbits=1):
 		super(SerialInput, self).__init__(app)