diff --git a/tmux.conf b/tmux.conf
index 2e88298..fb7f65a 100644
--- a/tmux.conf
+++ b/tmux.conf
@@ -52,7 +52,7 @@ bind Enter resize-pane -Z
 bind C-Enter resize-pane -Z
 
 # Enable smart pane switching that's Emacs aware.
-is_emacs='echo "#{pane_current_command}" | grep -iqE "(^|\/)emacs$"'
+is_emacs='echo "#{pane_current_command}" | grep -iqE "(^|\/)emacs(-[^\/]+)?$"'
 
 # Use Alt-[i/k/j/l] keys without prefix key to switch panes if current pane is
 # not running Emacs. If the pane is running Emacs, let Emacs receive the