diff --git a/git_lint/reporters.py b/git_lint/reporters.py
index d8a2720..59c8c74 100644
--- a/git_lint/reporters.py
+++ b/git_lint/reporters.py
@@ -1,4 +1,5 @@
 from __future__ import print_function
+from functools import reduce
 from .git_lint import load_config, run_linters, git_base
 import operator
 import gettext