diff --git a/core/modules/utils/utils.js b/core/modules/utils/utils.js
index 316797337..ac9f273e1 100644
--- a/core/modules/utils/utils.js
+++ b/core/modules/utils/utils.js
@@ -280,7 +280,7 @@ exports.formatDateString = function(date,template) {
 				return $tw.utils.pad(date.getSeconds());
 			}],
 			[/^0XXX/, function() {
-				return $tw.utils.pad(date.getMilliseconds());
+				return $tw.utils.pad(date.getMilliseconds(),4);
 			}],
 			[/^0DD/, function() {
 				return $tw.utils.pad(date.getDate());