diff --git a/utils/performance/howfast.py b/utils/performance/howfast.py
index b99117d6c..cc74c6a0a 100755
--- a/utils/performance/howfast.py
+++ b/utils/performance/howfast.py
@@ -23,8 +23,8 @@ def test():
     TOTAL_TIME += (time.time() - start)
 
 def f_(set):
-    min_ = str(min(set*1000))[:6]
-    avg = str(sum(set*1000)/len(set))[:6]
+    min_ = str(min(set)*1000)[:6]
+    avg = str((sum(set)/len(set))*1000)[:6]
     print 'min: %sms | avg: %sms | total: %ss' % (min_,avg,str(TOTAL_TIME)[:6])
 
 if __name__=='__main__':