diff --git a/sh/tmux.sh b/sh/tmux.sh
index 00ef126..9213e01 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -27,7 +27,9 @@ rwx_tmux_kill() {
 # list
 #= tml
 rwx_tmux_list() {
-	ls "/tmp/tmux-$(id --user)"
+	local user_id
+	user_id="$(id --user)"
+	ls "/tmp/tmux-${user_id}"
 }
 
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