diff --git a/logitech/g19.py b/logitech/g19.py
index d8d7544..b9679cc 100644
--- a/logitech/g19.py
+++ b/logitech/g19.py
@@ -246,16 +246,9 @@ class G19(object):
         (data[239 * 2], data[239 * 2 + 1]) the lower left one.
 
         '''
-        if len(data) != (320 * 240 * 2):
-            raise ValueError("illegal frame size: " + str(len(data))
-                    + " should be 320x240x2=" + str(320 * 240 * 2))
-
-        frame = list(self.__frame_content)
-        frame += data
-
         self.__usbDeviceMutex.acquire()
         try:
-            self.__usbDevice.handleIf0.bulkWrite(2, frame, self.__write_timeout)
+            self.__usbDevice.handleIf0.bulkWrite(2, list(self.__frame_content) + data, self.__write_timeout)
         finally:
             self.__usbDeviceMutex.release()