diff --git a/dot_tmux.conf.tmpl b/dot_tmux.conf.tmpl
index b9b3110..dbee3e5 100644
--- a/dot_tmux.conf.tmpl
+++ b/dot_tmux.conf.tmpl
@@ -108,7 +108,7 @@ bind-key M-3 send-keys "$FAVORITE_COMMAND3"
 bind-key M-4 send-keys "$FAVORITE_COMMAND4"
 
 # disposable terminal
-bind Space display-popup -E -w 80% -h 80% "tmux kill-session -t popup 2>/dev/null || true; tmux new-session -d -s popup -c '#{pane_current_path}' \\; set-option -t popup detach-on-destroy on \\; attach -t popup"
+bind-key + display-popup -E -w 80% -h 80% "tmux kill-session -t popup 2>/dev/null || true; tmux new-session -d -s popup -c '#{pane_current_path}' \\; set-option -t popup detach-on-destroy on \\; attach -t popup"
 
 # Reload tmux config
 unbind r