diff --git a/.tmux.conf b/.tmux.conf
index e38fd02..af1e18b 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -191,6 +191,8 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 # __newline='
 # '
 #
+# _uname_s=$(uname -s)
+#
 # _is_enabled() {
 #   [ x"$1" = x"true" ] || [ x"$1" = x"yes" ] || [ x"$1" = x"enabled" ] || [ x"$1" = x"1" ]
 # }
@@ -255,8 +257,7 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 # _battery() {
 #   count=0
 #   charge=0
-#   uname_s=$(uname -s)
-#   case "$uname_s" in
+#   case "$_uname_s" in
 #     *Darwin*)
 #       while IFS= read -r line; do
 #         if [ x"$discharging" != x"true" ]; then
@@ -472,7 +473,11 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 #
 # _tty_info() {
 #   tty="${1##/dev/}"
-#   uname -s | grep -q "CYGWIN" && cygwin=true
+#   case "$_uname_s" in
+#     *CYGWIN*)
+#       cygwin=true
+#       ;;
+#   esac
 #
 #   if [ x"$cygwin" = x"true" ]; then
 #     ps -af | tail -n +2 | awk -v tty="$tty" '
@@ -592,7 +597,7 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 # }
 #
 # _uptime() {
-#   case $(uname -s) in
+#   case "$_uname_s" in
 #     *Darwin*)
 #       boot=$(sysctl -q -n kern.boottime | awk -F'[ ,:]+' '{ print $4 }')
 #       now=$(date +%s)
@@ -626,7 +631,7 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 # }
 #
 # _loadavg() {
-#   case $(uname -s) in
+#   case "$_uname_s" in
 #     *Darwin*)
 #       tmux set -g @loadavg "$(sysctl -q -n vm.loadavg | cut -d' ' -f2)"
 #       ;;