diff --git a/builds/appchan-x.user.js b/builds/appchan-x.user.js
index 59835a3ee..d71d0b8ca 100644
--- a/builds/appchan-x.user.js
+++ b/builds/appchan-x.user.js
@@ -11327,7 +11327,7 @@
         cur = ThreadUpdater.outdateCount || 1;
         limit = d.hidden ? 7 : 10;
         j = cur <= limit ? cur : limit;
-        cur = ((i * 0.1).floor() || 1) * j * j;
+        cur = (Math.floor(i * 0.1) || 1) * j * j;
         ThreadUpdater.seconds = cur > i ? cur <= 300 ? cur : 300 : i;
       } else {
         ThreadUpdater.seconds = i;
diff --git a/builds/crx/script.js b/builds/crx/script.js
index 4d58f83d3..a6d692696 100644
--- a/builds/crx/script.js
+++ b/builds/crx/script.js
@@ -11313,7 +11313,7 @@
         cur = ThreadUpdater.outdateCount || 1;
         limit = d.hidden ? 7 : 10;
         j = cur <= limit ? cur : limit;
-        cur = ((i * 0.1).floor() || 1) * j * j;
+        cur = (Math.floor(i * 0.1) || 1) * j * j;
         ThreadUpdater.seconds = cur > i ? cur <= 300 ? cur : 300 : i;
       } else {
         ThreadUpdater.seconds = i;
diff --git a/src/Monitoring/ThreadUpdater.coffee b/src/Monitoring/ThreadUpdater.coffee
index 8854457de..dde86f610 100755
--- a/src/Monitoring/ThreadUpdater.coffee
+++ b/src/Monitoring/ThreadUpdater.coffee
@@ -158,7 +158,7 @@ ThreadUpdater =
       j     = if cur <= limit then cur else limit
 
       # 1 second to 100, 30 to 300.
-      cur = ((i * 0.1).floor() or 1) * j * j
+      cur = (Math.floor(i * 0.1) or 1) * j * j
       ThreadUpdater.seconds =
         if cur > i
           if cur <= 300