diff --git a/share/functions/prompt_pwd.fish b/share/functions/prompt_pwd.fish
index 991b007b7..ce98f6d44 100644
--- a/share/functions/prompt_pwd.fish
+++ b/share/functions/prompt_pwd.fish
@@ -1,14 +1,13 @@
+set -l args_pre
+set -l args_post
 switch (uname)
 case Darwin
-	function prompt_pwd --description "Print the current working directory, shortened to fit the prompt"
-		echo $PWD | sed -e "s|^$HOME|~|" -e 's|^/private||' -e 's-\([^/.]\)[^/]*/-\1/-g'
-	end
+	set args_pre $args_pre -e 's|^/private/|/|'
 case 'CYGWIN_*'
-	function prompt_pwd --description "Print the current working directory, shortened to fit the prompt"
-		echo $PWD | sed -e "s|^$HOME|~|" -e 's|^/cygdrive/\(.\)|\1/:|' -e 's-\([^/.]\)[^/]*/-\1/-g' -e 's-^\([^/]\)/:/\?-\u\1:/-'
-	end
-case '*'
-	function prompt_pwd --description "Print the current working directory, shortened to fit the prompt"
-		echo $PWD | sed -e "s|^$HOME|~|" -e 's-\([^/.]\)[^/]*/-\1/-g'
-	end
+	set args_pre $args_pre -e 's|^/cygdrive/\(.\)|\1/:|'
+	set args_post $args_post -e 's-^\([^/]\)/:/\?-\u\1:/-'
+end
+
+function prompt_pwd -V args_pre -V args_post --description "Print the current working directory, shortened to fit the prompt"
+	echo $PWD | sed -e "s|^$HOME|~|" $args_pre -e 's-\([^/.]\)[^/]*/-\1/-g' $args_post
 end