Index: zshrc
==================================================================
--- zshrc
+++ zshrc
@@ -136,11 +136,11 @@
 	if [ -n "$1" ]; then
 	       	local branch="$(color $color_vcs_braces)($(color $color_vcs)$1"
 		branch+="$(color $color_vcs_braces))"
 	fi
 
-	if [ "$(whoami)" != "$normal_user" ]; then
+	if [ "$USER" != "$normal_user" ]; then
 		local user="%n@"
 	fi
 
 	PS1="$(color $color_host)$user%m $(color $color_cwd)%c$branch"
 	PS1+="$(color $color_suffix)%(!.#.>)$(nocolor) "