diff --git a/tmux/tmux.conf.symlink b/tmux/tmux.conf.symlink
index e5a05bb..8accda6 100644
--- a/tmux/tmux.conf.symlink
+++ b/tmux/tmux.conf.symlink
@@ -13,6 +13,9 @@ unbind C-b
 set -g prefix C-a
 bind C-a send-prefix
 
+# for nested tmux sessions
+bind-key a send-prefix
+
 # Activity Monitoring
 setw -g monitor-activity off
 set -g visual-activity off