diff --git a/pure.zsh b/pure.zsh
index d50b7d4..897c777 100644
--- a/pure.zsh
+++ b/pure.zsh
@@ -33,7 +33,7 @@
 	setopt prompt_subst
 
 	# show username@host if logged in through SSH
-	if [[ -n "$SSH_CLIENT" || -n "$SSH_TTY" ]]; then
+	if [[ $SSH_CLIENT != '' || $SSH_TTY != '' ]]; then
 		local username='%n@%m '
 	fi