diff --git a/missing.py b/missing.py
index 2484902..95d4d5a 100644
--- a/missing.py
+++ b/missing.py
@@ -28,7 +28,7 @@ __missing_files__ =  set()
 def add(file_name):
 	if not os.path.exists(file_name):
 		if __checkout_missing__:
-			subprocess.call("git checkout \"" + file_name.strip() + "\"")
+			subprocess.call("git checkout \"" + file_name.strip() + "\"", shell=True)
 		else:
 			__missing_files__.add(file_name)
 			return True