diff --git a/lib/timers.js b/lib/timers.js
index d0bd9a93aa3..e67ebd2d881 100644
--- a/lib/timers.js
+++ b/lib/timers.js
@@ -85,7 +85,7 @@ function insert(item, msecs) {
       var first;
       while (first = peek(list)) {
         var diff = now - first._idleStart;
-        if (diff < msecs) {
+        if (diff + 1 < msecs) {
           list.again(msecs - diff);
           debug(msecs + ' list wait because diff is ' + diff);
           return;