diff --git a/zz-extra/lxc-build b/zz-extra/lxc-build
index acbe979..f843344 100755
--- a/zz-extra/lxc-build
+++ b/zz-extra/lxc-build
@@ -173,7 +173,7 @@ class LXCImage:
         self.cwd = cwd
         self.rebuild_config()
 
-    def set_halt(self, cwd):
+    def set_halt(self, halt):
         self.halt = halt
         self.rebuild_config()