diff --git a/template.jst b/template.jst
index d6e11806c..0df0742bf 100644
--- a/template.jst
+++ b/template.jst
@@ -53,11 +53,12 @@ var engine = (function() {
   if (/Chrome\//.test(navigator.userAgent)) return 'blink';
   if (/WebKit\//.test(navigator.userAgent)) return 'webkit';
   if (/Gecko\/|Goanna/.test(navigator.userAgent)) return 'gecko';
+  if (/Presto\//.test(navigator.userAgent)) return 'presto';
 })();
 if (engine) {
-  var engines = {'firefox': 'gecko', 'chromium': 'blink', 'safari': 'webkit', 'webkitgtk-': 'webkit'};
+  var engines = {'firefox': 'gecko', 'chromium': 'blink presto', 'safari': 'webkit', 'webkitgtk-': 'webkit'};
   for (browser in engines) {
-    document.getElementById(browser + '-hide').checked = (engine !== engines[browser]);
+    document.getElementById(browser + '-hide').checked = (engines[browser].indexOf(engine) < 0);
   }
 }
 </script>