diff --git a/files/etc/zsh/zshenv b/files/etc/zsh/zshenv
index a752b1e..7266555 100644
--- a/files/etc/zsh/zshenv
+++ b/files/etc/zsh/zshenv
@@ -1,4 +1,4 @@
 #!/bin/sh
-[ -z "$XDG_DATA_DIRS" ] && export XDG_DATA_DIRS="/usr/local/share:/usr/share"
-[ -z "$XDG_CONFIG_HOME" ] && export XDG_CONFIG_HOME="$HOME/.config"
-[ -d "$XDG_CONFIG_HOME/zsh" ] && export ZDOTDIR="$XDG_CONFIG_HOME/zsh"
+[ -z "${XDG_DATA_DIRS}" ] && export XDG_DATA_DIRS="/usr/local/share:/usr/share"
+[ -z "${XDG_CONFIG_HOME}" ] && export XDG_CONFIG_HOME="${HOME}/.config"
+[ -d "${XDG_CONFIG_HOME}/zsh" ] && export ZDOTDIR="${XDG_CONFIG_HOME}/zsh"