diff --git a/.zshrc b/.zshrc
index e38a9cb..f0f753f 100644
--- a/.zshrc
+++ b/.zshrc
@@ -93,7 +93,7 @@ alias .=source
 alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'
 alias k9=k9s
 alias rsync="rsync -e 'ssh -o RemoteCommand=none'"
-alias sudosu="sudo ZDOTDIR=$(dirname ${0:a}) zsh"
+alias sudosu="sudo ZDOTDIR=$(dirname ${(%):-%x}) zsh"
 alias ll='ls -alFh'
 alias ls="ls --color=auto"
 alias lsl="ls --color=auto -lah"