diff --git a/hlna-git/postinstall.sh b/hlna-git/postinstall.sh
index dfffeb2..baf4265 100644
--- a/hlna-git/postinstall.sh
+++ b/hlna-git/postinstall.sh
@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
-if -e $HOME/.zshrc; then
+if -f $HOME/.zshrc; then
 echo 'alias hlna="hlna.py"' >> $HOME/.zshrc
 echo 'alias hlna-bot="hlna-bot.py"' >> $HOME/.zshrc
 source ~/.zshrc
-elif -e $HOME/.config/fish/config.fish; then
+elif -f $HOME/.config/fish/config.fish; then
 echo 'alias hlna="hlna.py"' >> $HOME/.config/fish/config.fish
 echo 'alias hlna-bot="hlna-bot.py"' >> $HOME/.config/fish/config.fish
 source ~/.config/fish/config.fish