diff --git a/oletools/olevba3.py b/oletools/olevba3.py
index 85d8336..7e74352 100644
--- a/oletools/olevba3.py
+++ b/oletools/olevba3.py
@@ -77,6 +77,8 @@ https://github.com/unixfreak0037/officeparser
 # SOFTWARE.
 
 from __future__ import print_function
+from functools import reduce
+
 
 #------------------------------------------------------------------------------
 # CHANGELOG: