diff --git a/git-p4.py b/git-p4.py
index daa60c60d..212ef2be9 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -24,6 +24,7 @@
 import stat
 import zipfile
 import zlib
+import ctypes
 
 try:
     from subprocess import CalledProcessError