diff --git a/zshrc b/zshrc
index d72d498..47b6474 100644
--- a/zshrc
+++ b/zshrc
@@ -85,3 +85,5 @@ if [ -d "$HOME/.local/bin" ]; then
 fi
 
 # . ~/.local/lib/python2.7/site-packages/powerline/bindings/zsh/powerline.zsh
+
+if [ -z "$TMUX" ]; then tmux; fi