diff --git a/maint-helper.py b/maint-helper.py
index 09fa9c62..bc87976d 100755
--- a/maint-helper.py
+++ b/maint-helper.py
@@ -20,6 +20,7 @@ import os
 import sys
 import re
 import datetime
+import subprocess
 
 source_exts = [ '.py', '.c', '.h', '.cpp' ]