diff --git a/www/gplot/hm-rt.gplot b/www/gplot/hm-rt.gplot
index b07a1d076..b41de59c5 100644
--- a/www/gplot/hm-rt.gplot
+++ b/www/gplot/hm-rt.gplot
@@ -10,7 +10,7 @@ set timefmt "%Y-%m-%d_%H:%M:%S"
 set xlabel " "
 set ytics nomirror
 set y2tics
-set yrange 0:100
+set yrange [0:100]
 set title '<L1>'
 set grid xtics y2tics