diff --git a/.config/herbstluftwm/panel.sh b/.config/herbstluftwm/panel.sh
index 2ec9eae..48c1600 100755
--- a/.config/herbstluftwm/panel.sh
+++ b/.config/herbstluftwm/panel.sh
@@ -143,7 +143,7 @@ herbstclient pad $monitor2 -5 -5 -5 -5
             ;;
     esac
 
-    sleep 1
+    sleep 1s
 } 2> /dev/null | dzen2 -w $width -x $x -y $y -fn "$font" -h $height \
     -ta l -bg "$bgcolor"