diff --git a/generic/tests/netperf.py b/generic/tests/netperf.py
index ee7ae005476be18b15d49731e383e8a07b62ae11..6ba1232bd6232e1d04b8e910737133e8061dc49c 100644
--- a/generic/tests/netperf.py
+++ b/generic/tests/netperf.py
@@ -9,7 +9,7 @@ from autotest.client.shared import error
 from virttest import utils_test, utils_misc, utils_net, remote, data_dir
 
 
-def format_result(result, base="12", fbase="2"):
+def format_result(result, base="12", fbase="5"):
     """
     Format the result to a fixed length string.