diff --git a/tmux.conf b/tmux.conf
index e8d0fa4..b63810d 100644
--- a/tmux.conf
+++ b/tmux.conf
@@ -128,8 +128,8 @@ setw -g status-style fg=colour240,bg=colour233
 # Right status style shows system info, date, and time.
 setw -g status-right "#[fg=colour240]#(cat ~/.cache/tmux/system-info)#[fg=white] %a %d-%m-%y %H:%M "
 setw -g status-right-style fg=white,bg=colour233
-if -b '[[ "`uname`" != "Darwin" ]]' \
-  run 'tmux setw -g status-right-length $((`nproc --all` + 32))'
+if -b '[ "`uname`" != "Darwin" ]' \
+  'run "tmux setw -g status-right-length $((`nproc --all` + 32))"'
 
 # Active window status style
 setw -g window-status-current-format " #{window_index}: #{window_name}"