diff --git a/powerline/bindings/tmux/powerline.conf b/powerline/bindings/tmux/powerline.conf
index 81928706..3fb316a3 100644
--- a/powerline/bindings/tmux/powerline.conf
+++ b/powerline/bindings/tmux/powerline.conf
@@ -8,7 +8,7 @@ set -g status-interval 2
 set -g status-left-length 20
 set -g status-right '#(eval $POWERLINE_COMMAND tmux right -R pane_id=`tmux display -p "#D"`)'
 set -g status-right-length 150
-set -g window-status-format "#[fg=colour244,bg=colour234]#I #[fg=colour240] #[default]#W "
+set -g window-status-format "#[fg=colour244,bg=colour234]  #I #[fg=colour240] #[default]#W "
 set -g window-status-current-format "#[fg=colour234,bg=colour31]#[fg=colour117,bg=colour31] #I  #[fg=colour231,bold]#W #[fg=colour31,bg=colour234,nobold]"
 
 # Legacy status-left definition to be overwritten for tmux Versions 1.8+