diff --git a/zsh/macdev b/zsh/macdev
index 827f26d..0f621fb 100755
--- a/zsh/macdev
+++ b/zsh/macdev
@@ -3,8 +3,8 @@ case `uname -s` in
 	Darwin)
 		dev_path=/Developer/usr
 		if [[ -r $dev_path ]] ; then
-			export PATH=$PATH:$dev_path/bin:$dev_path/sbin
-			export MANPATH=`manpath -c`:$dev_path/share/man
+			export PATH="${dev_path}/bin:${dev_path}/sbin:${PATH}"
+			export MANPATH="${dev_path}/share/man":$(manpath)
 		fi
 	;;
 esac