diff --git a/FAQ.md b/FAQ.md
index fb99747..9210ec6 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -3,7 +3,7 @@
 [fz](https://github.com/changyuheng/fz) is a bash/zsh plugin that seamlessly adds fuzzy search to tab completion of z.sh. `z.lua` can work with it for better completion result, just define a `_z` function and pass all the arguments to `_zlua` before sourcing fz.sh:
 
 ```bash
-function _z() { _zlua "$@"; }
+FZ_HISTORY_CD_CMD="_zlua"
 source /path/to/fz.sh
 ```