diff --git a/direct/src/showutil/FreezeTool.py b/direct/src/showutil/FreezeTool.py
index fb346b1610..78bc993f3a 100644
--- a/direct/src/showutil/FreezeTool.py
+++ b/direct/src/showutil/FreezeTool.py
@@ -8,7 +8,7 @@ import marshal
 import imp
 import platform
 import struct
-from io import StringIO
+from io import StringIO, TextIOWrapper
 import distutils.sysconfig as sysconf
 import zipfile