diff --git a/js/server_status_monitor.js b/js/server_status_monitor.js
index 766d5a1cf4..cbc9644082 100644
--- a/js/server_status_monitor.js
+++ b/js/server_status_monitor.js
@@ -1326,7 +1326,7 @@ AJAX.registerOnload('server_status_monitor.js', function () {
 
             selectionTimeDiff.push(datapos.xaxis);
 
-            if (selectionTimeDiff[1] < selectionTimeDiff[0]) {
+            if (selectionTimeDiff[1] <= selectionTimeDiff[0]) {
                 selectionTimeDiff = [];
                 return;
             }