diff --git a/.config/tmux/tmux.conf b/.config/tmux/tmux.conf
index 0c26e3f..932ee2e 100644
--- a/.config/tmux/tmux.conf
+++ b/.config/tmux/tmux.conf
@@ -8,6 +8,9 @@ unbind C-b
 set-option -g prefix C-a
 bind-key C-a send-prefix
 
+# Use C-b to send prefix twice so it acts on nested session
+bind-key -n C-b send-prefix
+
 # split panes using | and -
 bind | split-window -h
 bind - split-window -v