diff --git a/git-p4.py b/git-p4.py
index a60c086b18..ff4113a661 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -22,6 +22,7 @@
 import re
 import shutil
 import stat
+import ctypes
 
 try:
     from subprocess import CalledProcessError