diff --git a/piku.py b/piku.py
index 2bcb7d7..e20f93d 100644
--- a/piku.py
+++ b/piku.py
@@ -616,7 +616,7 @@ def receive(app):
         with open(hook_path,'w') as h:
             h.write("""#!/usr/bin/env bash
 set -e; set -o pipefail;
-cat | PIKU_ROOT="%s" %s git-hook %s""" % (PIKU_ROOT, realpath(__file__) app))
+cat | PIKU_ROOT="%s" %s git-hook %s""" % (PIKU_ROOT, realpath(__file__), app))
         # Make the hook executable by our user
         os.chmod(hook_path, os.stat(hook_path).st_mode | stat.S_IXUSR)
     # Handle the actual receive. We'll be called with 'git-hook' after it happens