diff --git a/Tests/get_hist.py b/Tests/get_hist.py
index c51ab96..a664293 100755
--- a/Tests/get_hist.py
+++ b/Tests/get_hist.py
@@ -50,7 +50,7 @@ print s
time.sleep(1)
-sendstr = "\nget_history_data\n\n0x00000000\n\n".format(my_macid)
+sendstr = "\nget_history_data\n{0}\n0x00000000\n\n".format(my_macid)
s.sendall(sendstr)
print