diff --git a/src/filesystem/FileSystem.js b/src/filesystem/FileSystem.js
index 8c76b4394b2..3390249c3ae 100644
--- a/src/filesystem/FileSystem.js
+++ b/src/filesystem/FileSystem.js
@@ -817,7 +817,7 @@ define(function (require, exports, module) {
             var oldStat = entry._stat;
             if (entry.isFile) {
                 // Update stat and clear contents, but only if out of date
-                if (!(stat && oldStat && stat.mtime.getTime() === oldStat.mtime.getTime())) {
+                if (!(stat && oldStat && stat.mtime.getTime() <= oldStat.mtime.getTime())) {
                     entry._clearCachedData();
                     entry._stat = stat;
                     this._fireChangeEvent(entry);