diff --git a/views/default.handlebars b/views/default.handlebars
index e6091f79..454b0cd3 100644
--- a/views/default.handlebars
+++ b/views/default.handlebars
@@ -6467,7 +6467,7 @@
 
             // Draw the timeline
             var x = '', count = 1, date = new Date();
-            var totalWidth = Q('masthead').offsetWidth - (160 + 9 + 9 + 14); // Compute the total width of the power bar
+            var totalWidth = Q('column_l').offsetWidth - (160 + 9 + 9 + 14); // Compute the total width of the power bar
             date.setHours(0, 0, 0, 0);
             for (var i = 0; i < 7; i++) {
                 var datavalue = '', start = date.getTime(), end = start + (1000 * 60 * 60 * 24);