diff --git a/plexpy/helpers.py b/plexpy/helpers.py
index 9eb4a5eb..1ed8415e 100644
--- a/plexpy/helpers.py
+++ b/plexpy/helpers.py
@@ -1024,7 +1024,7 @@ def build_datatables_json(kwargs, dt_columns, default_sort_col=None):
     return json.dumps(json_data)
 
 
-def humanFileSize(bytes, si=False):
+def humanFileSize(bytes, si=True):
     if str(bytes).isdigit():
         bytes = cast_to_float(bytes)
     else: