diff --git a/mitmproxy/utils/human.py b/mitmproxy/utils/human.py
index 951feef4a..b301ba1b1 100644
--- a/mitmproxy/utils/human.py
+++ b/mitmproxy/utils/human.py
@@ -20,7 +20,7 @@ def pretty_size(size):
         if bottom[1] <= size < top[1]:
             suf = bottom[0]
             lim = bottom[1]
-            x = round(size / lim, 2)
+            x = round(size / lim)
             if x == int(x):
                 x = int(x)
             return str(x) + suf
diff --git a/test/mitmproxy/utils/test_human.py b/test/mitmproxy/utils/test_human.py
index 6f8bf732f..9317388d4 100644
--- a/test/mitmproxy/utils/test_human.py
+++ b/test/mitmproxy/utils/test_human.py
@@ -29,7 +29,7 @@ def test_pretty_size():
     assert human.pretty_size(0) == "0b"
     assert human.pretty_size(100) == "100b"
     assert human.pretty_size(1024) == "1k"
-    assert human.pretty_size(1024 + (1024 / 2.0)) == "1.5k"
+    assert human.pretty_size(1024 + (1024 / 2.0)) == "2k"
     assert human.pretty_size(1024 * 1024) == "1m"
     assert human.pretty_size(10 * 1024 * 1024) == "10m"