diff --git a/tmux/n-bindings.tmux b/tmux/n-bindings.tmux
index 9c29556..456fb6a 100644
--- a/tmux/n-bindings.tmux
+++ b/tmux/n-bindings.tmux
@@ -30,3 +30,6 @@ bind-key -n M-c new-window
 bind-key -n M-v split-window -v
 bind-key -n M-b split-window -h
 bind-key -n M-q killp
+
+# nested session with ctrl-a
+bind-key -n C-a send-prefix