diff --git a/zsh-autotmux/.zsh/99-autotmux.zsh b/zsh-autotmux/.zsh/99-autotmux.zsh
new file mode 100644
index 0000000..4dee6ef
--- /dev/null
+++ b/zsh-autotmux/.zsh/99-autotmux.zsh
@@ -0,0 +1,5 @@
+if [ -z "$TMUX" ]; then
+        if which tmux >/dev/null 2>&1; then
+                tmux -q has-session && exec tmux attach-session -d || exec tmux new-session
+        fi
+fi