diff --git a/tmsys.sh b/tmsys.sh
index 66710d5..0c11cae 100755
--- a/tmsys.sh
+++ b/tmsys.sh
@@ -39,4 +39,4 @@ tmux new-window -n "scratch" -t "${session}"
 
 # finally select window 1 and attach to the new session
 tmux select-window -t "${session}:1"
-tmux attach-session -t "${session}"
+tmux -u attach-session -t "${session}"