diff --git a/FAQ.md b/FAQ.md
index 19ba72f..3ec62ce 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -6,7 +6,7 @@ A: `-` is a reserved character in lua regexp. you can use either `z vue%-my%-ui`
 
 If you don't like this behavior, you can set: 
 
-    export $_ZL_HYPHEN=1
+    export _ZL_HYPHEN=1
 
 to escape `-` into `%-` automatically and `z vue-my-ui` will jump to `~/Documents/github/vue-my-ui` but you cannot use `-` as a regexp keywords any more.