diff --git a/tmux.conf b/tmux.conf
index a12b941..dd25b49 100644
--- a/tmux.conf
+++ b/tmux.conf
@@ -118,7 +118,7 @@ if -b '[ "`uname`" = "Darwin" ]' \
     "xclip -i -sel p -f | xclip -i -sel c"'
 
 # Left status style
-if -b '[ -n $WSL_DISTRO_NAME ]' \
+if -b '[ "$WSL_DISTRO_NAME" != "" ]' \
   'setw -g status-left " #(hostname)|#{WSL_DISTRO_NAME}|#{session_name}"' \
   'setw -g status-left " #(hostname)|#{session_name}"'
 setw -g status-left-style fg=colour240,bg=colour233